256313508 has 48 divisors (see below), whose sum is σ = 653619456. Its totient is φ = 77529760.

The previous prime is 256313489. The next prime is 256313527. The reversal of 256313508 is 805313652.

It is an interprime number because it is at equal distance from previous prime (256313489) and next prime (256313527).

It is a super-2 number, since 2×256313508² = 131393228766532128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88735 + ... + 91577.

It is an arithmetic number, because the mean of its divisors is an integer number (13617072).

Almost surely, 2^256313508 is an apocalyptic number.

It is an amenable number.

256313508 is an abundant number, since it is smaller than the sum of its proper divisors (397305948).

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

256313508 is a wasteful number, since it uses less digits than its factorization.

256313508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3544 (or 3542 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 256313508 is about 16009.7941273459. The cubic root of 256313508 is about 635.2195144927.

The spelling of 256313508 in words is "two hundred fifty-six million, three hundred thirteen thousand, five hundred eight".