56561357 has 2 divisors, whose sum is σ = 56561358. Its totient is φ = 56561356.

The previous prime is 56561341. The next prime is 56561371. The reversal of 56561357 is 75316565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41615401 + 14945956 = 6451^2 + 3866^2 .

It is a cyclic number.

It is not a de Polignac number, because 56561357 - 2⁴ = 56561341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56561357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56551357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28280678 + 28280679.

It is an arithmetic number, because the mean of its divisors is an integer number (28280679).

Almost surely, 2^56561357 is an apocalyptic number.

It is an amenable number.

56561357 is a deficient number, since it is larger than the sum of its proper divisors (1).

56561357 is an equidigital number, since it uses as much as digits as its factorization.

56561357 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 56561357 is about 7520.7284886506. The cubic root of 56561357 is about 383.8603663500.

The spelling of 56561357 in words is "fifty-six million, five hundred sixty-one thousand, three hundred fifty-seven".