56556361 has 2 divisors, whose sum is σ = 56556362. Its totient is φ = 56556360.

The previous prime is 56556347. The next prime is 56556371. The reversal of 56556361 is 16365565.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49266361 + 7290000 = 7019^2 + 2700^2 .

It is a cyclic number.

It is not a de Polignac number, because 56556361 - 2⁵ = 56556329 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56556361.

It is not a weakly prime, because it can be changed into another prime (56556301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278180 + 28278181.

It is an arithmetic number, because the mean of its divisors is an integer number (28278181).

Almost surely, 2^56556361 is an apocalyptic number.

It is an amenable number.

56556361 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556361 is an equidigital number, since it uses as much as digits as its factorization.

56556361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 37.

The square root of 56556361 is about 7520.3963326410. The cubic root of 56556361 is about 383.8490640348.

The spelling of 56556361 in words is "fifty-six million, five hundred fifty-six thousand, three hundred sixty-one".