51531704 has 16 divisors (see below), whose sum is σ = 110425200. Its totient is φ = 22084992.

The previous prime is 51531679. The next prime is 51531731. The reversal of 51531704 is 40713515.

51531704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460049 + ... + 460160.

It is an arithmetic number, because the mean of its divisors is an integer number (6901575).

Almost surely, 2^51531704 is an apocalyptic number.

It is an amenable number.

51531704 is an abundant number, since it is smaller than the sum of its proper divisors (58893496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51531704 is a wasteful number, since it uses less digits than its factorization.

51531704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920222 (or 920218 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 51531704 is about 7178.5586296972. The cubic root of 51531704 is about 372.1272736740.

The spelling of 51531704 in words is "fifty-one million, five hundred thirty-one thousand, seven hundred four".