51713518 has 16 divisors (see below), whose sum is σ = 80248320. Its totient is φ = 24967800.

The previous prime is 51713509. The next prime is 51713521. The reversal of 51713518 is 81531715.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 51713518.

It is a congruent number.

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, 52773 + ... + 53743.

It is an arithmetic number, because the mean of its divisors is an integer number (5015520).

Almost surely, 2^51713518 is an apocalyptic number.

51713518 is a deficient number, since it is larger than the sum of its proper divisors (28534802).

51713518 is a wasteful number, since it uses less digits than its factorization.

51713518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863.

The product of its digits is 4200, while the sum is 31.

The square root of 51713518 is about 7191.2111636358. The cubic root of 51713518 is about 372.5644060818.

The spelling of 51713518 in words is "fifty-one million, seven hundred thirteen thousand, five hundred eighteen".