255133521500 has 144 divisors (see below), whose sum is σ = 659587551168. Its totient is φ = 85638960000.

The previous prime is 255133521457. The next prime is 255133521563. The reversal of 255133521500 is 5125331552.

It is a super-2 number, since 2×255133521500² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 624305 + ... + 948695.

Almost surely, 2^255133521500 is an apocalyptic number.

255133521500 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 255133521500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329793775584).

255133521500 is an abundant number, since it is smaller than the sum of its proper divisors (404454029668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255133521500 is a wasteful number, since it uses less digits than its factorization.

255133521500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324445 (or 324422 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The spelling of 255133521500 in words is "two hundred fifty-five billion, one hundred thirty-three million, five hundred twenty-one thousand, five hundred".