51597636 has 12 divisors (see below), whose sum is σ = 120394512. Its totient is φ = 17199208.

The previous prime is 51597629. The next prime is 51597701. The reversal of 51597636 is 63679515.

It is a happy number.

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

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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, 2149890 + ... + 2149913.

It is an arithmetic number, because the mean of its divisors is an integer number (10032876).

Almost surely, 2^51597636 is an apocalyptic number.

It is an amenable number.

51597636 is an abundant number, since it is smaller than the sum of its proper divisors (68796876).

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

51597636 is a wasteful number, since it uses less digits than its factorization.

51597636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299810 (or 4299808 counting only the distinct ones).

The product of its digits is 170100, while the sum is 42.

The square root of 51597636 is about 7183.1494485358. The cubic root of 51597636 is about 372.2859115426.

The spelling of 51597636 in words is "fifty-one million, five hundred ninety-seven thousand, six hundred thirty-six".