225256652557 has 2 divisors, whose sum is σ = 225256652558. Its totient is φ = 225256652556.

The previous prime is 225256652521. The next prime is 225256652563. The reversal of 225256652557 is 755256652522.

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., 172699256041 + 52557396516 = 415571^2 + 229254^2 .

It is a cyclic number.

It is not a de Polignac number, because 225256652557 - 2³⁵ = 190896914189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225256652057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112628326278 + 112628326279.

It is an arithmetic number, because the mean of its divisors is an integer number (112628326279).

Almost surely, 2^225256652557 is an apocalyptic number.

It is an amenable number.

225256652557 is a deficient number, since it is larger than the sum of its proper divisors (1).

225256652557 is an equidigital number, since it uses as much as digits as its factorization.

225256652557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600000, while the sum is 52.

The spelling of 225256652557 in words is "two hundred twenty-five billion, two hundred fifty-six million, six hundred fifty-two thousand, five hundred fifty-seven".