51864972 has 48 divisors (see below), whose sum is σ = 125126400. Its totient is φ = 16708032.

The previous prime is 51864961. The next prime is 51864973. The reversal of 51864972 is 27946815.

51864972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51864973) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 88063 + ... + 88649.

It is an arithmetic number, because the mean of its divisors is an integer number (2606800).

Almost surely, 2^51864972 is an apocalyptic number.

It is an amenable number.

51864972 is an abundant number, since it is smaller than the sum of its proper divisors (73261428).

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

51864972 is a wasteful number, since it uses less digits than its factorization.

51864972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 828 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 51864972 is about 7201.7339578743. The cubic root of 51864972 is about 372.9277628704.

The spelling of 51864972 in words is "fifty-one million, eight hundred sixty-four thousand, nine hundred seventy-two".