51518992 has 30 divisors (see below), whose sum is σ = 116116638. Its totient is φ = 22079232.

The previous prime is 51518963. The next prime is 51519007. The reversal of 51518992 is 29981515.

It can be written as a sum of positive squares in only one way, i.e., 49787136 + 1731856 = 7056^2 + 1316^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32073 + ... + 33640.

Almost surely, 2^51518992 is an apocalyptic number.

It is an amenable number.

51518992 is an abundant number, since it is smaller than the sum of its proper divisors (64597646).

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

51518992 is a wasteful number, since it uses less digits than its factorization.

51518992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65735 (or 65722 counting only the distinct ones).

The product of its digits is 32400, while the sum is 40.

The square root of 51518992 is about 7177.6731605723. The cubic root of 51518992 is about 372.0966719889.

The spelling of 51518992 in words is "fifty-one million, five hundred eighteen thousand, nine hundred ninety-two".