252255221 has 2 divisors, whose sum is σ = 252255222. Its totient is φ = 252255220.

The previous prime is 252255217. The next prime is 252255257. The reversal of 252255221 is 122552252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222159025 + 30096196 = 14905^2 + 5486^2 .

It is a cyclic number.

It is not a de Polignac number, because 252255221 - 2² = 252255217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252255271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126127610 + 126127611.

It is an arithmetic number, because the mean of its divisors is an integer number (126127611).

Almost surely, 2^252255221 is an apocalyptic number.

It is an amenable number.

252255221 is a deficient number, since it is larger than the sum of its proper divisors (1).

252255221 is an equidigital number, since it uses as much as digits as its factorization.

252255221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000, while the sum is 26.

The square root of 252255221 is about 15882.5445379511. The cubic root of 252255221 is about 631.8491242755.

The spelling of 252255221 in words is "two hundred fifty-two million, two hundred fifty-five thousand, two hundred twenty-one".