51687675 has 72 divisors (see below), whose sum is σ = 102368448. Its totient is φ = 24768000.

The previous prime is 51687661. The next prime is 51687689. The reversal of 51687675 is 57678615.

It is an interprime number because it is at equal distance from previous prime (51687661) and next prime (51687689).

It is not a de Polignac number, because 51687675 - 2¹⁵ = 51654907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51687675.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 119710 + ... + 120140.

It is an arithmetic number, because the mean of its divisors is an integer number (1421784).

Almost surely, 2^51687675 is an apocalyptic number.

51687675 is a deficient number, since it is larger than the sum of its proper divisors (50680773).

51687675 is a wasteful number, since it uses less digits than its factorization.

51687675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 493 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 51687675 is about 7189.4140929564. The cubic root of 51687675 is about 372.5023347150.

The spelling of 51687675 in words is "fifty-one million, six hundred eighty-seven thousand, six hundred seventy-five".