252521324402 has 8 divisors (see below), whose sum is σ = 381546819036. Its totient is φ = 125339051392.

The previous prime is 252521324371. The next prime is 252521324467. The reversal of 252521324402 is 204423125252.

It can be written as a sum of positive squares in 2 ways, for example, as 245154707161 + 7366617241 = 495131^2 + 85829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460805063 + ... + 460805610.

Almost surely, 2^252521324402 is an apocalyptic number.

252521324402 is a deficient number, since it is larger than the sum of its proper divisors (129025494634).

252521324402 is a wasteful number, since it uses less digits than its factorization.

252521324402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921610812.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 252521324402 its reverse (204423125252), we get a palindrome (456944449654).

The spelling of 252521324402 in words is "two hundred fifty-two billion, five hundred twenty-one million, three hundred twenty-four thousand, four hundred two".