51730724 has 12 divisors (see below), whose sum is σ = 90591900. Its totient is φ = 25847328.

The previous prime is 51730717. The next prime is 51730733. The reversal of 51730724 is 42703715.

It can be written as a sum of positive squares in 2 ways, for example, as 50694400 + 1036324 = 7120^2 + 1018^2 .

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, 3542 + ... + 10770.

It is an arithmetic number, because the mean of its divisors is an integer number (7549325).

Almost surely, 2^51730724 is an apocalyptic number.

It is an amenable number.

51730724 is a deficient number, since it is larger than the sum of its proper divisors (38861176).

51730724 is a wasteful number, since it uses less digits than its factorization.

51730724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9022 (or 9020 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 51730724 is about 7192.4073855699. The cubic root of 51730724 is about 372.6057210842.

The spelling of 51730724 in words is "fifty-one million, seven hundred thirty thousand, seven hundred twenty-four".