56216639 has 2 divisors, whose sum is σ = 56216640. Its totient is φ = 56216638.

The previous prime is 56216627. The next prime is 56216651. The reversal of 56216639 is 93661265.

It is a balanced prime because it is at equal distance from previous prime (56216627) and next prime (56216651).

It is a cyclic number.

It is not a de Polignac number, because 56216639 - 2¹² = 56212543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56216659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28108319 + 28108320.

It is an arithmetic number, because the mean of its divisors is an integer number (28108320).

Almost surely, 2^56216639 is an apocalyptic number.

56216639 is a deficient number, since it is larger than the sum of its proper divisors (1).

56216639 is an equidigital number, since it uses as much as digits as its factorization.

56216639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 56216639 is about 7497.7756034707. The cubic root of 56216639 is about 383.0789535162.

The spelling of 56216639 in words is "fifty-six million, two hundred sixteen thousand, six hundred thirty-nine".