56512729 has 24 divisors (see below), whose sum is σ = 71756160. Its totient is φ = 44108064.

The previous prime is 56512723. The next prime is 56512739. The reversal of 56512729 is 92721565.

It is a de Polignac number, because none of the positive numbers 2^k-56512729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56512723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49762 + ... + 50884.

It is an arithmetic number, because the mean of its divisors is an integer number (2989840).

Almost surely, 2^56512729 is an apocalyptic number.

It is an amenable number.

56512729 is a deficient number, since it is larger than the sum of its proper divisors (15243431).

56512729 is a wasteful number, since it uses less digits than its factorization.

56512729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1222 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 56512729 is about 7517.4948619869. The cubic root of 56512729 is about 383.7503282437.

The spelling of 56512729 in words is "fifty-six million, five hundred twelve thousand, seven hundred twenty-nine".