51637884 has 12 divisors (see below), whose sum is σ = 120488424. Its totient is φ = 17212624.

The previous prime is 51637871. The next prime is 51637919. The reversal of 51637884 is 48873615.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2151567 + ... + 2151590.

It is an arithmetic number, because the mean of its divisors is an integer number (10040702).

Almost surely, 2^51637884 is an apocalyptic number.

It is an amenable number.

51637884 is an abundant number, since it is smaller than the sum of its proper divisors (68850540).

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

51637884 is a wasteful number, since it uses less digits than its factorization.

51637884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303164 (or 4303162 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 51637884 is about 7185.9504590555. The cubic root of 51637884 is about 372.3826851564.

The spelling of 51637884 in words is "fifty-one million, six hundred thirty-seven thousand, eight hundred eighty-four".