252121543215 has 16 divisors (see below), whose sum is σ = 403541064288. Its totient is φ = 134415958016.

The previous prime is 252121543151. The next prime is 252121543237. The reversal of 252121543215 is 512345121252.

It is a cyclic number.

It is not a de Polignac number, because 252121543215 - 2⁶ = 252121543151 is a prime.

It is a super-2 number, since 2×252121543215² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3011394 + ... + 3093983.

It is an arithmetic number, because the mean of its divisors is an integer number (25221316518).

Almost surely, 2^252121543215 is an apocalyptic number.

252121543215 is a deficient number, since it is larger than the sum of its proper divisors (151419521073).

252121543215 is a wasteful number, since it uses less digits than its factorization.

252121543215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108138.

The product of its digits is 24000, while the sum is 33.

Adding to 252121543215 its reverse (512345121252), we get a palindrome (764466664467).

The spelling of 252121543215 in words is "two hundred fifty-two billion, one hundred twenty-one million, five hundred forty-three thousand, two hundred fifteen".