51361516 has 12 divisors (see below), whose sum is σ = 90080032. Its totient is φ = 25624368.

The previous prime is 51361511. The next prime is 51361537. The reversal of 51361516 is 61516315.

It is not an unprimeable number, because it can be changed into a prime (51361511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12015 + ... + 15718.

Almost surely, 2^51361516 is an apocalyptic number.

It is an amenable number.

51361516 is a deficient number, since it is larger than the sum of its proper divisors (38718516).

51361516 is a wasteful number, since it uses less digits than its factorization.

51361516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28200 (or 28198 counting only the distinct ones).

The product of its digits is 2700, while the sum is 28.

The square root of 51361516 is about 7166.6949146730. The cubic root of 51361516 is about 371.7171608106.

The spelling of 51361516 in words is "fifty-one million, three hundred sixty-one thousand, five hundred sixteen".