51642504 has 48 divisors (see below), whose sum is σ = 144693900. Its totient is φ = 16619904.

The previous prime is 51642457. The next prime is 51642529. The reversal of 51642504 is 40524615.

It can be written as a sum of positive squares in 2 ways, for example, as 48024900 + 3617604 = 6930^2 + 1902^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10279 + ... + 14454.

Almost surely, 2^51642504 is an apocalyptic number.

It is an amenable number.

51642504 is an abundant number, since it is smaller than the sum of its proper divisors (93051396).

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

51642504 is a wasteful number, since it uses less digits than its factorization.

51642504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24774 (or 24767 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51642504 is about 7186.2719124731. The cubic root of 51642504 is about 372.3937904185.

The spelling of 51642504 in words is "fifty-one million, six hundred forty-two thousand, five hundred four".