56213539 has 2 divisors, whose sum is σ = 56213540. Its totient is φ = 56213538.

The previous prime is 56213527. The next prime is 56213567. The reversal of 56213539 is 93531265.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56213539 - 2⁷ = 56213411 is a prime.

It is not a weakly prime, because it can be changed into another prime (56213569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28106769 + 28106770.

It is an arithmetic number, because the mean of its divisors is an integer number (28106770).

Almost surely, 2^56213539 is an apocalyptic number.

56213539 is a deficient number, since it is larger than the sum of its proper divisors (1).

56213539 is an equidigital number, since it uses as much as digits as its factorization.

56213539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 34.

The square root of 56213539 is about 7497.5688726413. The cubic root of 56213539 is about 383.0719119084.

The spelling of 56213539 in words is "fifty-six million, two hundred thirteen thousand, five hundred thirty-nine".