51307972 has 24 divisors (see below), whose sum is σ = 96284160. Its totient is φ = 23836800.

The previous prime is 51307969. The next prime is 51307981. The reversal of 51307972 is 27970315.

51307972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597 + ... + 10147.

It is an arithmetic number, because the mean of its divisors is an integer number (4011840).

Almost surely, 2^51307972 is an apocalyptic number.

It is an amenable number.

51307972 is a deficient number, since it is larger than the sum of its proper divisors (44976188).

51307972 is a wasteful number, since it uses less digits than its factorization.

51307972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9651 (or 9649 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 51307972 is about 7162.9583273952. The cubic root of 51307972 is about 371.5879451024.

The spelling of 51307972 in words is "fifty-one million, three hundred seven thousand, nine hundred seventy-two".