56581243 has 2 divisors, whose sum is σ = 56581244. Its totient is φ = 56581242.

The previous prime is 56581241. The next prime is 56581303. The reversal of 56581243 is 34218565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56581243 - 2¹ = 56581241 is a prime.

Together with 56581241, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 56581199 and 56581208.

It is not a weakly prime, because it can be changed into another prime (56581241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28290621 + 28290622.

It is an arithmetic number, because the mean of its divisors is an integer number (28290622).

Almost surely, 2^56581243 is an apocalyptic number.

56581243 is a deficient number, since it is larger than the sum of its proper divisors (1).

56581243 is an equidigital number, since it uses as much as digits as its factorization.

56581243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 56581243 is about 7522.0504518382. The cubic root of 56581243 is about 383.9053473125.

The spelling of 56581243 in words is "fifty-six million, five hundred eighty-one thousand, two hundred forty-three".