51279904 has 24 divisors (see below), whose sum is σ = 108724140. Its totient is φ = 23667456.

The previous prime is 51279887. The next prime is 51279911. The reversal of 51279904 is 40997215.

It can be written as a sum of positive squares in 2 ways, for example, as 50979600 + 300304 = 7140^2 + 548^2 .

It is a Smith number, since the sum of its digits (37) 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, 61219 + ... + 62050.

Almost surely, 2^51279904 is an apocalyptic number.

It is an amenable number.

51279904 is an abundant number, since it is smaller than the sum of its proper divisors (57444236).

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

51279904 is a wasteful number, since it uses less digits than its factorization.

51279904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123292 (or 123284 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 51279904 is about 7160.9988130148. The cubic root of 51279904 is about 371.5201737440.

The spelling of 51279904 in words is "fifty-one million, two hundred seventy-nine thousand, nine hundred four".