255531504 has 60 divisors (see below), whose sum is σ = 669368616. Its totient is φ = 84000384.

The previous prime is 255531487. The next prime is 255531511. The reversal of 255531504 is 405135552.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299142 + ... + 299994.

Almost surely, 2^255531504 is an apocalyptic number.

255531504 is a gapful number since it is divisible by the number (24) 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 255531504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334684308).

255531504 is an abundant number, since it is smaller than the sum of its proper divisors (413837112).

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

255531504 is an equidigital number, since it uses as much as digits as its factorization.

255531504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 255531504 is about 15985.3527956064. The cubic root of 255531504 is about 634.5728451768.

The spelling of 255531504 in words is "two hundred fifty-five million, five hundred thirty-one thousand, five hundred four".