56213243 has 2 divisors, whose sum is σ = 56213244. Its totient is φ = 56213242.

The previous prime is 56213239. The next prime is 56213251. The reversal of 56213243 is 34231265.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56213243 - 2² = 56213239 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (56213233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28106621 + 28106622.

It is an arithmetic number, because the mean of its divisors is an integer number (28106622).

Almost surely, 2^56213243 is an apocalyptic number.

56213243 is a deficient number, since it is larger than the sum of its proper divisors (1).

56213243 is an equidigital number, since it uses as much as digits as its factorization.

56213243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 56213243 is about 7497.5491328834. The cubic root of 56213243 is about 383.0712395348.

The spelling of 56213243 in words is "fifty-six million, two hundred thirteen thousand, two hundred forty-three".