252153512521 has 4 divisors (see below), whose sum is σ = 252155766544. Its totient is φ = 252151258500.

The previous prime is 252153512509. The next prime is 252153512551. The reversal of 252153512521 is 125215351252.

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 a cyclic number.

It is not a de Polignac number, because 252153512521 - 2¹³ = 252153504329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252153512551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 949935 + ... + 1186036.

It is an arithmetic number, because the mean of its divisors is an integer number (63038941636).

Almost surely, 2^252153512521 is an apocalyptic number.

It is an amenable number.

252153512521 is a deficient number, since it is larger than the sum of its proper divisors (2254023).

252153512521 is a wasteful number, since it uses less digits than its factorization.

252153512521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254022.

The product of its digits is 30000, while the sum is 34.

Adding to 252153512521 its reverse (125215351252), we get a palindrome (377368863773).

The spelling of 252153512521 in words is "two hundred fifty-two billion, one hundred fifty-three million, five hundred twelve thousand, five hundred twenty-one".