| Base | Representation |
|---|---|
| bin | 1011101000001010… |
| … | …0011100101011100 |
| 3 | 22001112011000200100 |
| 4 | 2322002203211130 |
| 5 | 22343013412340 |
| 6 | 1233414501100 |
| 7 | 140230015251 |
| oct | 27202434534 |
| 9 | 8045130610 |
| 10 | 3121232220 |
| 11 | 1361943a67 |
| 12 | 731364790 |
| 13 | 3a9850292 |
| 14 | 218763428 |
| 15 | 13403e830 |
| hex | ba0a395c |
3121232220 has 144 divisors (see below), whose sum is σ = 10031243040. Its totient is φ = 783364608.
The previous prime is 3121232203. The next prime is 3121232221. The reversal of 3121232220 is 222321213.
3121232220 is a `hidden beast` number, since 312 + 12 + 322 + 20 = 666.
It is a super-2 number, since 2×31212322202 = 19484181142332256800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 3121232193 and 3121232202.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3121232221) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 534034 + ... + 539846.
It is an arithmetic number, because the mean of its divisors is an integer number (69661410).
Almost surely, 23121232220 is an apocalyptic number.
3121232220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 3121232220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5015621520).
3121232220 is an abundant number, since it is smaller than the sum of its proper divisors (6910010820).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
3121232220 is a wasteful number, since it uses less digits than its factorization.
3121232220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6004 (or 5999 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 18.
The square root of 3121232220 is about 55867.9892245998. The cubic root of 3121232220 is about 1461.4210565071.
Adding to 3121232220 its reverse (222321213), we get a palindrome (3343553433).
The spelling of 3121232220 in words is "three billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred twenty".
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