252422534645621 has 4 divisors (see below), whose sum is σ = 252422632727244. Its totient is φ = 252422436564000.

The previous prime is 252422534645573. The next prime is 252422534645693. The reversal of 252422534645621 is 126546435224252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173409102543121 + 79013432102500 = 13168489^2 + 8888950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252422534645621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252422534645221) 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, 45073430 + ... + 50363271.

It is an arithmetic number, because the mean of its divisors is an integer number (63105658181811).

Almost surely, 2^{252422534645621} is an apocalyptic number.

It is an amenable number.

252422534645621 is a deficient number, since it is larger than the sum of its proper divisors (98081623).

252422534645621 is an equidigital number, since it uses as much as digits as its factorization.

252422534645621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98081622.

The product of its digits is 27648000, while the sum is 53.

Adding to 252422534645621 its reverse (126546435224252), we get a palindrome (378968969869873).

The spelling of 252422534645621 in words is "two hundred fifty-two trillion, four hundred twenty-two billion, five hundred thirty-four million, six hundred forty-five thousand, six hundred twenty-one".