51979974 has 16 divisors (see below), whose sum is σ = 104087808. Its totient is φ = 17305352.

The previous prime is 51979951. The next prime is 51980009. The reversal of 51979974 is 47997915.

It is a happy number.

It is a congruent number.

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, 439 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (6505488).

Almost surely, 2^51979974 is an apocalyptic number.

51979974 is an abundant number, since it is smaller than the sum of its proper divisors (52107834).

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

51979974 is a wasteful number, since it uses less digits than its factorization.

51979974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10659.

The product of its digits is 714420, while the sum is 51.

The square root of 51979974 is about 7209.7138639477. The cubic root of 51979974 is about 373.2031946138.

The spelling of 51979974 in words is "fifty-one million, nine hundred seventy-nine thousand, nine hundred seventy-four".