256031312 has 20 divisors (see below), whose sum is σ = 500700096. Its totient is φ = 126818400.

The previous prime is 256031309. The next prime is 256031317. The reversal of 256031312 is 213130652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256031317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73064 + ... + 76487.

Almost surely, 2^256031312 is an apocalyptic number.

It is an amenable number.

256031312 is a deficient number, since it is larger than the sum of its proper divisors (244668784).

256031312 is a wasteful number, since it uses less digits than its factorization.

256031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149666 (or 149660 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 256031312 is about 16000.9784700811. The cubic root of 256031312 is about 634.9863075974.

Adding to 256031312 its reverse (213130652), we get a palindrome (469161964).

The spelling of 256031312 in words is "two hundred fifty-six million, thirty-one thousand, three hundred twelve".