56215279 has 2 divisors, whose sum is σ = 56215280. Its totient is φ = 56215278.

The previous prime is 56215241. The next prime is 56215297. The reversal of 56215279 is 97251265.

Together with next prime (56215297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56215279 - 2²³ = 47826671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56219279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28107639 + 28107640.

It is an arithmetic number, because the mean of its divisors is an integer number (28107640).

Almost surely, 2^56215279 is an apocalyptic number.

56215279 is a deficient number, since it is larger than the sum of its proper divisors (1).

56215279 is an equidigital number, since it uses as much as digits as its factorization.

56215279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 56215279 is about 7497.6849093570. The cubic root of 56215279 is about 383.0758643266.

The spelling of 56215279 in words is "fifty-six million, two hundred fifteen thousand, two hundred seventy-nine".