| Base | Representation |
|---|---|
| bin | 11100110111111000… |
| … | …011110000011100000 |
| 3 | 2222000121100002110120 |
| 4 | 130313320132003200 |
| 5 | 1001443043233440 |
| 6 | 22124155200240 |
| 7 | 2145160244601 |
| oct | 346770360340 |
| 9 | 88017302416 |
| 10 | 31002321120 |
| 11 | 1216a0027a1 |
| 12 | 6012746080 |
| 13 | 2c00c35914 |
| 14 | 17015dbda8 |
| 15 | c16b17dd0 |
| hex | 737e1e0e0 |
31002321120 has 96 divisors (see below), whose sum is σ = 97971793920. Its totient is φ = 8240663040.
The previous prime is 31002320989. The next prime is 31002321121. The reversal of 31002321120 is 2112320013.
It is a tau number, because it is divible by the number of its divisors (96).
It is a super-2 number, since 2×310023211202 (a number of 22 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (15).
It is a self number, because there is not a number n which added to its sum of digits gives 31002321120.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (31002321121) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45441 + ... + 253119.
It is an arithmetic number, because the mean of its divisors is an integer number (1020539520).
Almost surely, 231002321120 is an apocalyptic number.
31002321120 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 31002321120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48985896960).
31002321120 is an abundant number, since it is smaller than the sum of its proper divisors (66969472800).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
31002321120 is a wasteful number, since it uses less digits than its factorization.
31002321120 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 208008 (or 208000 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 15.
Adding to 31002321120 its reverse (2112320013), we get a palindrome (33114641133).
The spelling of 31002321120 in words is "thirty-one billion, two million, three hundred twenty-one thousand, one hundred twenty".
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