51879820 has 12 divisors (see below), whose sum is σ = 108947664. Its totient is φ = 20751920.

The previous prime is 51879781. The next prime is 51879847. The reversal of 51879820 is 2897815.

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, 1296976 + ... + 1297015.

It is an arithmetic number, because the mean of its divisors is an integer number (9078972).

Almost surely, 2^51879820 is an apocalyptic number.

It is an amenable number.

51879820 is an abundant number, since it is smaller than the sum of its proper divisors (57067844).

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

51879820 is a wasteful number, since it uses less digits than its factorization.

51879820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594000 (or 2593998 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 51879820 is about 7202.7647469565. The cubic root of 51879820 is about 372.9633469579.

The spelling of 51879820 in words is "fifty-one million, eight hundred seventy-nine thousand, eight hundred twenty".