51879631 has 4 divisors (see below), whose sum is σ = 54931392. Its totient is φ = 48827872.

The previous prime is 51879601. The next prime is 51879679. The reversal of 51879631 is 13697815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51879631 - 2⁵ = 51879599 is a prime.

It is a super-2 number, since 2×51879631² = 5382992225392322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51879601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525855 + ... + 1525888.

It is an arithmetic number, because the mean of its divisors is an integer number (13732848).

Almost surely, 2^51879631 is an apocalyptic number.

51879631 is a deficient number, since it is larger than the sum of its proper divisors (3051761).

51879631 is a wasteful number, since it uses less digits than its factorization.

51879631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051760.

The product of its digits is 45360, while the sum is 40.

The square root of 51879631 is about 7202.7516269826. The cubic root of 51879631 is about 372.9628940512.

The spelling of 51879631 in words is "fifty-one million, eight hundred seventy-nine thousand, six hundred thirty-one".