51295716 has 18 divisors (see below), whose sum is σ = 129664262. Its totient is φ = 17098560.

The previous prime is 51295667. The next prime is 51295723. The reversal of 51295716 is 61759215.

It can be written as a sum of positive squares in only one way, i.e., 51065316 + 230400 = 7146^2 + 480^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1424881 = 51295716 / (5 + 1 + 2 + 9 + 5 + 7 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712405 + ... + 712476.

Almost surely, 2^51295716 is an apocalyptic number.

It is an amenable number.

51295716 is an abundant number, since it is smaller than the sum of its proper divisors (78368546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51295716 is a wasteful number, since it uses less digits than its factorization.

51295716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424891 (or 1424886 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 51295716 is about 7162.1027638536. The cubic root of 51295716 is about 371.5583555192.

The spelling of 51295716 in words is "fifty-one million, two hundred ninety-five thousand, seven hundred sixteen".