51755979 has 16 divisors (see below), whose sum is σ = 75648384. Its totient is φ = 31214400.

The previous prime is 51755971. The next prime is 51755983. The reversal of 51755979 is 97955715.

It is not a de Polignac number, because 51755979 - 2³ = 51755971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51755971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3247 + ... + 10679.

It is an arithmetic number, because the mean of its divisors is an integer number (4728024).

Almost surely, 2^51755979 is an apocalyptic number.

51755979 is a deficient number, since it is larger than the sum of its proper divisors (23892405).

51755979 is a wasteful number, since it uses less digits than its factorization.

51755979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7658.

The product of its digits is 496125, while the sum is 48.

The square root of 51755979 is about 7194.1628421937. The cubic root of 51755979 is about 372.6663467358. Note that the first 3 decimals are identical.

The spelling of 51755979 in words is "fifty-one million, seven hundred fifty-five thousand, nine hundred seventy-nine".