256331250 has 288 divisors, whose sum is σ = 854945280. Its totient is φ = 56700000.

The previous prime is 256331209. The next prime is 256331263. The reversal of 256331250 is 52133652.

256331250 is a `hidden beast` number, since 2 + 5 + 633 + 1 + 25 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8268735 + ... + 8268765.

It is an arithmetic number, because the mean of its divisors is an integer number (2968560).

Almost surely, 2^256331250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256331250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427472640).

256331250 is an abundant number, since it is smaller than the sum of its proper divisors (598614030).

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

256331250 is an equidigital number, since it uses as much as digits as its factorization.

256331250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 256331250 is about 16010.3482160758. The cubic root of 256331250 is about 635.2341707687.

The spelling of 256331250 in words is "two hundred fifty-six million, three hundred thirty-one thousand, two hundred fifty".