| Base | Representation |
|---|---|
| bin | 1011110101011001001… |
| … | …0000010001110110100 |
| 3 | 201102210002120111110100 |
| 4 | 2331112102002032310 |
| 5 | 11312340110444340 |
| 6 | 233222204554100 |
| 7 | 20455144152153 |
| oct | 2752622021664 |
| 9 | 642702514410 |
| 10 | 203311031220 |
| 11 | 7925085aa40 |
| 12 | 334a0552930 |
| 13 | 1623129454b |
| 14 | 9ba9b2d59a |
| 15 | 544dea5830 |
| hex | 2f564823b4 |
203311031220 has 288 divisors, whose sum is σ = 678809424384. Its totient is φ = 48847276800.
The previous prime is 203311031149. The next prime is 203311031227. The reversal of 203311031220 is 22130113302.
203311031220 is a `hidden beast` number, since 2 + 0 + 331 + 1 + 0 + 312 + 20 = 666.
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 = 203311031193 and 203311031202.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (203311031227) by changing a digit.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 158464699 + ... + 158465981.
It is an arithmetic number, because the mean of its divisors is an integer number (2356977168).
Almost surely, 2203311031220 is an apocalyptic number.
203311031220 is a gapful number since it is divisible by the number (20) 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 203311031220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339404712192).
203311031220 is an abundant number, since it is smaller than the sum of its proper divisors (475498393164).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
203311031220 is a wasteful number, since it uses less digits than its factorization.
203311031220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1963 (or 1958 counting only the distinct ones).
The product of its (nonzero) digits is 216, while the sum is 18.
Adding to 203311031220 its reverse (22130113302), we get a palindrome (225441144522).
It can be divided in two parts, 2033 and 11031220, that added together give a triangular number (11033253 = T4697).
The spelling of 203311031220 in words is "two hundred three billion, three hundred eleven million, thirty-one thousand, two hundred twenty".
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