56225390257 has 2 divisors, whose sum is σ = 56225390258. Its totient is φ = 56225390256.

The previous prime is 56225390251. The next prime is 56225390293. The reversal of 56225390257 is 75209352265.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30109537441 + 26115852816 = 173521^2 + 161604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56225390257 is a prime.

It is a super-2 number, since 2×56225390257² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56225390251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28112695128 + 28112695129.

It is an arithmetic number, because the mean of its divisors is an integer number (28112695129).

Almost surely, 2^56225390257 is an apocalyptic number.

It is an amenable number.

56225390257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56225390257 is an equidigital number, since it uses as much as digits as its factorization.

56225390257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 56225390257 in words is "fifty-six billion, two hundred twenty-five million, three hundred ninety thousand, two hundred fifty-seven".