51768969 has 32 divisors (see below), whose sum is σ = 81126144. Its totient is φ = 28753920.

The previous prime is 51768967. The next prime is 51768989. The reversal of 51768969 is 96986715.

It is not a de Polignac number, because 51768969 - 2¹ = 51768967 is a prime.

It is a super-2 number, since 2×51768969² = 5360052302645922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51768967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214689 + ... + 214929.

It is an arithmetic number, because the mean of its divisors is an integer number (2535192).

Almost surely, 2^51768969 is an apocalyptic number.

It is an amenable number.

51768969 is a deficient number, since it is larger than the sum of its proper divisors (29357175).

51768969 is a wasteful number, since it uses less digits than its factorization.

51768969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497.

The product of its digits is 816480, while the sum is 51.

The square root of 51768969 is about 7195.0656008128. The cubic root of 51768969 is about 372.6975220769.

The spelling of 51768969 in words is "fifty-one million, seven hundred sixty-eight thousand, nine hundred sixty-nine".