252656881 has 2 divisors, whose sum is σ = 252656882. Its totient is φ = 252656880.

The previous prime is 252656861. The next prime is 252656891. The reversal of 252656881 is 188656252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225450225 + 27206656 = 15015^2 + 5216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252656881 is a prime.

It is a super-2 number, since 2×252656881² = 127670999033296322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252656861) 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, 126328440 + 126328441.

It is an arithmetic number, because the mean of its divisors is an integer number (126328441).

Almost surely, 2^252656881 is an apocalyptic number.

It is an amenable number.

252656881 is a deficient number, since it is larger than the sum of its proper divisors (1).

252656881 is an equidigital number, since it uses as much as digits as its factorization.

252656881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 43.

The square root of 252656881 is about 15895.1842078033. The cubic root of 252656881 is about 632.1843058914.

The spelling of 252656881 in words is "two hundred fifty-two million, six hundred fifty-six thousand, eight hundred eighty-one".