56656247 has 2 divisors, whose sum is σ = 56656248. Its totient is φ = 56656246.

The previous prime is 56656217. The next prime is 56656273. The reversal of 56656247 is 74265665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56656247 - 2⁶ = 56656183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56656217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28328123 + 28328124.

It is an arithmetic number, because the mean of its divisors is an integer number (28328124).

Almost surely, 2^56656247 is an apocalyptic number.

56656247 is a deficient number, since it is larger than the sum of its proper divisors (1).

56656247 is an equidigital number, since it uses as much as digits as its factorization.

56656247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 41.

The square root of 56656247 is about 7527.0344093806. The cubic root of 56656247 is about 384.0749071714.

The spelling of 56656247 in words is "fifty-six million, six hundred fifty-six thousand, two hundred forty-seven".