252522409 has 2 divisors, whose sum is σ = 252522410. Its totient is φ = 252522408.

The previous prime is 252522383. The next prime is 252522421. The reversal of 252522409 is 904225252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202777600 + 49744809 = 14240^2 + 7053^2 .

It is a cyclic number.

It is not a de Polignac number, because 252522409 - 2⁵ = 252522377 is a prime.

It is not a weakly prime, because it can be changed into another prime (252522449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126261204 + 126261205.

It is an arithmetic number, because the mean of its divisors is an integer number (126261205).

Almost surely, 2^252522409 is an apocalyptic number.

It is an amenable number.

252522409 is a deficient number, since it is larger than the sum of its proper divisors (1).

252522409 is an equidigital number, since it uses as much as digits as its factorization.

252522409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 252522409 is about 15890.9536844080. The cubic root of 252522409 is about 632.0721298130.

The spelling of 252522409 in words is "two hundred fifty-two million, five hundred twenty-two thousand, four hundred nine".