56081257 has 2 divisors, whose sum is σ = 56081258. Its totient is φ = 56081256.

The previous prime is 56081251. The next prime is 56081279. The reversal of 56081257 is 75218065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55666521 + 414736 = 7461^2 + 644^2 .

It is a cyclic number.

It is not a de Polignac number, because 56081257 - 2²³ = 47692649 is a prime.

It is not a weakly prime, because it can be changed into another prime (56081251) 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, 28040628 + 28040629.

It is an arithmetic number, because the mean of its divisors is an integer number (28040629).

Almost surely, 2^56081257 is an apocalyptic number.

It is an amenable number.

56081257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56081257 is an equidigital number, since it uses as much as digits as its factorization.

56081257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 56081257 is about 7488.7420171882. The cubic root of 56081257 is about 382.7711936117.

The spelling of 56081257 in words is "fifty-six million, eighty-one thousand, two hundred fifty-seven".