252435527221 has 2 divisors, whose sum is σ = 252435527222. Its totient is φ = 252435527220.

The previous prime is 252435527173. The next prime is 252435527243. The reversal of 252435527221 is 122725534252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183273891025 + 69161636196 = 428105^2 + 262986^2 .

It is a cyclic number.

It is not a de Polignac number, because 252435527221 - 2¹⁹ = 252435002933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252435527521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126217763610 + 126217763611.

It is an arithmetic number, because the mean of its divisors is an integer number (126217763611).

Almost surely, 2^252435527221 is an apocalyptic number.

It is an amenable number.

252435527221 is a deficient number, since it is larger than the sum of its proper divisors (1).

252435527221 is an equidigital number, since it uses as much as digits as its factorization.

252435527221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 40.

The spelling of 252435527221 in words is "two hundred fifty-two billion, four hundred thirty-five million, five hundred twenty-seven thousand, two hundred twenty-one".