51258724 has 24 divisors (see below), whose sum is σ = 98638848. Its totient is φ = 23113440.

The previous prime is 51258703. The next prime is 51258731. The reversal of 51258724 is 42785215.

It is a happy number.

It is a super-2 number, since 2×51258724² = 5254913572216352, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51258724.

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 7 ways as a sum of consecutive naturals, for example, 1002 + ... + 10174.

It is an arithmetic number, because the mean of its divisors is an integer number (4109952).

Almost surely, 2^51258724 is an apocalyptic number.

It is an amenable number.

51258724 is a deficient number, since it is larger than the sum of its proper divisors (47380124).

51258724 is a wasteful number, since it uses less digits than its factorization.

51258724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9315 (or 9313 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 51258724 is about 7159.5198163005. The cubic root of 51258724 is about 371.4690173763.

The spelling of 51258724 in words is "fifty-one million, two hundred fifty-eight thousand, seven hundred twenty-four".