51625986 has 16 divisors (see below), whose sum is σ = 103581504. Its totient is φ = 17153744.

The previous prime is 51625913. The next prime is 51625999. The reversal of 51625986 is 68952615.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11670 + ... + 15473.

It is an arithmetic number, because the mean of its divisors is an integer number (6473844).

Almost surely, 2^51625986 is an apocalyptic number.

51625986 is an abundant number, since it is smaller than the sum of its proper divisors (51955518).

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

51625986 is a wasteful number, since it uses less digits than its factorization.

51625986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27465.

The product of its digits is 129600, while the sum is 42.

The square root of 51625986 is about 7185.1225459278. The cubic root of 51625986 is about 372.3540824512.

The spelling of 51625986 in words is "fifty-one million, six hundred twenty-five thousand, nine hundred eighty-six".