51831472 has 40 divisors (see below), whose sum is σ = 125206272. Its totient is φ = 20193600.

The previous prime is 51831457. The next prime is 51831499. The reversal of 51831472 is 27413815.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a pancake number, because a pancake can be divided into 51831472 parts by 10181 straight cuts.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19804 + ... + 22267.

Almost surely, 2^51831472 is an apocalyptic number.

It is an amenable number.

51831472 is an abundant number, since it is smaller than the sum of its proper divisors (73374800).

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

51831472 is a wasteful number, since it uses less digits than its factorization.

51831472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42097 (or 42091 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 51831472 is about 7199.4077534197. The cubic root of 51831472 is about 372.8474532361.

The spelling of 51831472 in words is "fifty-one million, eight hundred thirty-one thousand, four hundred seventy-two".