56921513 has 8 divisors (see below), whose sum is σ = 62241696. Its totient is φ = 51625600.

The previous prime is 56921509. The next prime is 56921521. The reversal of 56921513 is 31512965.

56921513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56921513 - 2² = 56921509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56921513.

It is not an unprimeable number, because it can be changed into a prime (56921563) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 968 + ... + 10713.

It is an arithmetic number, because the mean of its divisors is an integer number (7780212).

Almost surely, 2^56921513 is an apocalyptic number.

It is an amenable number.

56921513 is a deficient number, since it is larger than the sum of its proper divisors (5320183).

56921513 is a wasteful number, since it uses less digits than its factorization.

56921513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12135.

The product of its digits is 8100, while the sum is 32.

The square root of 56921513 is about 7544.6347161410. The cubic root of 56921513 is about 384.6733902884.

The spelling of 56921513 in words is "fifty-six million, nine hundred twenty-one thousand, five hundred thirteen".