51497872 has 20 divisors (see below), whose sum is σ = 100056220. Its totient is φ = 25676928.

The previous prime is 51497869. The next prime is 51497891. The reversal of 51497872 is 27879415.

It can be written as a sum of positive squares in 2 ways, for example, as 34058896 + 17438976 = 5836^2 + 4176^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654 + ... + 10282.

It is an arithmetic number, because the mean of its divisors is an integer number (5002811).

Almost surely, 2^51497872 is an apocalyptic number.

It is an amenable number.

51497872 is a deficient number, since it is larger than the sum of its proper divisors (48558348).

51497872 is a wasteful number, since it uses less digits than its factorization.

51497872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010 (or 9004 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

The square root of 51497872 is about 7176.2017808866. The cubic root of 51497872 is about 372.0458185364.

The spelling of 51497872 in words is "fifty-one million, four hundred ninety-seven thousand, eight hundred seventy-two".