56215651 has 8 divisors (see below), whose sum is σ = 60241104. Its totient is φ = 52270080.

The previous prime is 56215589. The next prime is 56215673. The reversal of 56215651 is 15651265.

56215651 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 56215651 - 2¹⁵ = 56182883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56215051) 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, 18510 + ... + 21331.

It is an arithmetic number, because the mean of its divisors is an integer number (7530138).

Almost surely, 2^56215651 is an apocalyptic number.

56215651 is a deficient number, since it is larger than the sum of its proper divisors (4025453).

56215651 is a wasteful number, since it uses less digits than its factorization.

56215651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39941.

The product of its digits is 9000, while the sum is 31.

The square root of 56215651 is about 7497.7097169736. The cubic root of 56215651 is about 383.0767093158.

The spelling of 56215651 in words is "fifty-six million, two hundred fifteen thousand, six hundred fifty-one".