252220245409 has 4 divisors (see below), whose sum is σ = 275149358640. Its totient is φ = 229291132180.

The previous prime is 252220245397. The next prime is 252220245427. The reversal of 252220245409 is 904542022252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 252220245409 - 2⁵ = 252220245377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252220245469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11464556599 + ... + 11464556620.

It is an arithmetic number, because the mean of its divisors is an integer number (68787339660).

Almost surely, 2^252220245409 is an apocalyptic number.

It is an amenable number.

252220245409 is a deficient number, since it is larger than the sum of its proper divisors (22929113231).

252220245409 is a wasteful number, since it uses less digits than its factorization.

252220245409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22929113230.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 252220245409 in words is "two hundred fifty-two billion, two hundred twenty million, two hundred forty-five thousand, four hundred nine".