51256704 has 32 divisors (see below), whose sum is σ = 136151640. Its totient is φ = 17085440.

The previous prime is 51256703. The next prime is 51256721. The reversal of 51256704 is 40765215.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51256703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66357 + ... + 67124.

Almost surely, 2^51256704 is an apocalyptic number.

It is an amenable number.

51256704 is an abundant number, since it is smaller than the sum of its proper divisors (84894936).

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

51256704 is a wasteful number, since it uses less digits than its factorization.

51256704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133498 (or 133486 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 51256704 is about 7159.3787439973. The cubic root of 51256704 is about 371.4641377044.

The spelling of 51256704 in words is "fifty-one million, two hundred fifty-six thousand, seven hundred four".