56755613 has 2 divisors, whose sum is σ = 56755614. Its totient is φ = 56755612.

The previous prime is 56755609. The next prime is 56755631. The reversal of 56755613 is 31655765.

Together with next prime (56755631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55905529 + 850084 = 7477^2 + 922^2 .

It is a cyclic number.

It is not a de Polignac number, because 56755613 - 2² = 56755609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56755213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28377806 + 28377807.

It is an arithmetic number, because the mean of its divisors is an integer number (28377807).

Almost surely, 2^56755613 is an apocalyptic number.

It is an amenable number.

56755613 is a deficient number, since it is larger than the sum of its proper divisors (1).

56755613 is an equidigital number, since it uses as much as digits as its factorization.

56755613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 38.

The square root of 56755613 is about 7533.6321253430. The cubic root of 56755613 is about 384.2993113621.

The spelling of 56755613 in words is "fifty-six million, seven hundred fifty-five thousand, six hundred thirteen".