56415517 has 4 divisors (see below), whose sum is σ = 56563200. Its totient is φ = 56267836.

The previous prime is 56415509. The next prime is 56415521. The reversal of 56415517 is 71551465.

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 not a de Polignac number, because 56415517 - 2³ = 56415509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56415547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73267 + ... + 74032.

It is an arithmetic number, because the mean of its divisors is an integer number (14140800).

Almost surely, 2^56415517 is an apocalyptic number.

It is an amenable number.

56415517 is a deficient number, since it is larger than the sum of its proper divisors (147683).

56415517 is a wasteful number, since it uses less digits than its factorization.

56415517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147682.

The product of its digits is 21000, while the sum is 34.

The square root of 56415517 is about 7511.0263612904. The cubic root of 56415517 is about 383.5301622237.

The spelling of 56415517 in words is "fifty-six million, four hundred fifteen thousand, five hundred seventeen".