51427872 has 60 divisors (see below), whose sum is σ = 151255566. Its totient is φ = 17141760.

The previous prime is 51427867. The next prime is 51427877. The reversal of 51427872 is 27872415.

51427872 is a `hidden beast` number, since 514 + 2 + 78 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (51427867) and next prime (51427877).

It can be written as a sum of positive squares in only one way, i.e., 51322896 + 104976 = 7164^2 + 324^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51427877) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7329 + ... + 12512.

Almost surely, 2^51427872 is an apocalyptic number.

It is an amenable number.

51427872 is an abundant number, since it is smaller than the sum of its proper divisors (99827694).

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

51427872 is a wasteful number, since it uses less digits than its factorization.

51427872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19863 (or 19846 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 51427872 is about 7171.3228905133. The cubic root of 51427872 is about 371.8771706862.

The spelling of 51427872 in words is "fifty-one million, four hundred twenty-seven thousand, eight hundred seventy-two".