56215715 has 8 divisors (see below), whose sum is σ = 69104448. Its totient is φ = 43875520.

The previous prime is 56215711. The next prime is 56215721. The reversal of 56215715 is 51751265.

56215715 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 not a de Polignac number, because 56215715 - 2² = 56215711 is a prime.

It is a super-2 number, since 2×56215715² = 6320413225922450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56215711) 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, 136907 + ... + 137316.

It is an arithmetic number, because the mean of its divisors is an integer number (8638056).

Almost surely, 2^56215715 is an apocalyptic number.

56215715 is a deficient number, since it is larger than the sum of its proper divisors (12888733).

56215715 is a wasteful number, since it uses less digits than its factorization.

56215715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274269.

The product of its digits is 10500, while the sum is 32.

The square root of 56215715 is about 7497.7139849423. The cubic root of 56215715 is about 383.0768546899.

The spelling of 56215715 in words is "fifty-six million, two hundred fifteen thousand, seven hundred fifteen".