252355561 has 2 divisors, whose sum is σ = 252355562. Its totient is φ = 252355560.

The previous prime is 252355547. The next prime is 252355589. The reversal of 252355561 is 165553252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164352400 + 88003161 = 12820^2 + 9381^2 .

It is a cyclic number.

It is not a de Polignac number, because 252355561 - 2⁵ = 252355529 is a prime.

It is not a weakly prime, because it can be changed into another prime (252355501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126177780 + 126177781.

It is an arithmetic number, because the mean of its divisors is an integer number (126177781).

Almost surely, 2^252355561 is an apocalyptic number.

It is an amenable number.

252355561 is a deficient number, since it is larger than the sum of its proper divisors (1).

252355561 is an equidigital number, since it uses as much as digits as its factorization.

252355561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45000, while the sum is 34.

The square root of 252355561 is about 15885.7030376373. The cubic root of 252355561 is about 631.9328904133.

The spelling of 252355561 in words is "two hundred fifty-two million, three hundred fifty-five thousand, five hundred sixty-one".