51256724 has 24 divisors (see below), whose sum is σ = 93636648. Its totient is φ = 24527360.

The previous prime is 51256721. The next prime is 51256727. The reversal of 51256724 is 42765215.

It is an interprime number because it is at equal distance from previous prime (51256721) and next prime (51256727).

It can be written as a sum of positive squares in 4 ways, for example, as 10679824 + 40576900 = 3268^2 + 6370^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51256721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5744 + ... + 11640.

It is an arithmetic number, because the mean of its divisors is an integer number (3901527).

Almost surely, 2^51256724 is an apocalyptic number.

It is an amenable number.

51256724 is a deficient number, since it is larger than the sum of its proper divisors (42379924).

51256724 is a wasteful number, since it uses less digits than its factorization.

51256724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5995 (or 5993 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 51256724 is about 7159.3801407664. The cubic root of 51256724 is about 371.4641860186.

The spelling of 51256724 in words is "fifty-one million, two hundred fifty-six thousand, seven hundred twenty-four".