51539016 has 32 divisors (see below), whose sum is σ = 130404960. Its totient is φ = 16972032.

The previous prime is 51538997. The next prime is 51539027. The reversal of 51539016 is 61093515.

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, 10945 + ... + 14928.

It is an arithmetic number, because the mean of its divisors is an integer number (4075155).

Almost surely, 2^51539016 is an apocalyptic number.

It is an amenable number.

51539016 is an abundant number, since it is smaller than the sum of its proper divisors (78865944).

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

51539016 is a wasteful number, since it uses less digits than its factorization.

51539016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25965 (or 25961 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 51539016 is about 7179.0679060725. The cubic root of 51539016 is about 372.1448736221.

The spelling of 51539016 in words is "fifty-one million, five hundred thirty-nine thousand, sixteen".