51310724 has 12 divisors (see below), whose sum is σ = 89844048. Its totient is φ = 25641000.

The previous prime is 51310717. The next prime is 51310729. The reversal of 51310724 is 42701315.

It is a self number, because there is not a number n which added to its sum of digits gives 51310724.

It is not an unprimeable number, because it can be changed into a prime (51310729) by changing a digit.

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, 11399 + ... + 15249.

It is an arithmetic number, because the mean of its divisors is an integer number (7487004).

Almost surely, 2^51310724 is an apocalyptic number.

It is an amenable number.

51310724 is a deficient number, since it is larger than the sum of its proper divisors (38533324).

51310724 is a wasteful number, since it uses less digits than its factorization.

51310724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7186 (or 7184 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51310724 is about 7163.1504242198. The cubic root of 51310724 is about 371.5945885908.

The spelling of 51310724 in words is "fifty-one million, three hundred ten thousand, seven hundred twenty-four".