51371904 has 32 divisors (see below), whose sum is σ = 136457640. Its totient is φ = 17123840.

The previous prime is 51371899. The next prime is 51371911. The reversal of 51371904 is 40917315.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66507 + ... + 67274.

Almost surely, 2^51371904 is an apocalyptic number.

It is an amenable number.

51371904 is an abundant number, since it is smaller than the sum of its proper divisors (85085736).

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

51371904 is a wasteful number, since it uses less digits than its factorization.

51371904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133798 (or 133786 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 51371904 is about 7167.4196193609. The cubic root of 51371904 is about 371.7422193750.

The spelling of 51371904 in words is "fifty-one million, three hundred seventy-one thousand, nine hundred four".