56515601 has 4 divisors (see below), whose sum is σ = 56540400. Its totient is φ = 56490804.

The previous prime is 56515583. The next prime is 56515607. The reversal of 56515601 is 10651565.

56515601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56515601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56515607) 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 3 ways as a sum of consecutive naturals, for example, 8591 + ... + 13668.

It is an arithmetic number, because the mean of its divisors is an integer number (14135100).

Almost surely, 2^56515601 is an apocalyptic number.

It is an amenable number.

56515601 is a deficient number, since it is larger than the sum of its proper divisors (24799).

56515601 is a wasteful number, since it uses less digits than its factorization.

56515601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24798.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 56515601 is about 7517.6858806417. The cubic root of 56515601 is about 383.7568289165.

The spelling of 56515601 in words is "fifty-six million, five hundred fifteen thousand, six hundred one".