51215008 has 24 divisors (see below), whose sum is σ = 108586548. Its totient is φ = 23637504.

The previous prime is 51214991. The next prime is 51215029. The reversal of 51215008 is 80051215.

It can be written as a sum of positive squares in 2 ways, for example, as 51093904 + 121104 = 7148^2 + 348^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51215008.

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, 61141 + ... + 61972.

Almost surely, 2^51215008 is an apocalyptic number.

It is an amenable number.

51215008 is an abundant number, since it is smaller than the sum of its proper divisors (57371540).

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

51215008 is a wasteful number, since it uses less digits than its factorization.

51215008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123136 (or 123128 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 51215008 is about 7156.4661670408. The cubic root of 51215008 is about 371.3633848973.

The spelling of 51215008 in words is "fifty-one million, two hundred fifteen thousand, eight".