252162202221 has 8 divisors (see below), whose sum is σ = 373573632960. Its totient is φ = 168108134796.

The previous prime is 252162202213. The next prime is 252162202247. The reversal of 252162202221 is 122202261252.

It is a happy number.

252162202221 is a `hidden beast` number, since 2 + 5 + 216 + 220 + 2 + 221 = 666.

It is not a de Polignac number, because 252162202221 - 2³ = 252162202213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9339340823 = 252162202221 / (2 + 5 + 2 + 1 + 6 + 2 + 2 + 0 + 2 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252162202261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4669670385 + ... + 4669670438.

It is an arithmetic number, because the mean of its divisors is an integer number (46696704120).

Almost surely, 2^252162202221 is an apocalyptic number.

It is an amenable number.

252162202221 is a deficient number, since it is larger than the sum of its proper divisors (121411430739).

252162202221 is an equidigital number, since it uses as much as digits as its factorization.

252162202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9339340832 (or 9339340826 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 252162202221 its reverse (122202261252), we get a palindrome (374364463473).

The spelling of 252162202221 in words is "two hundred fifty-two billion, one hundred sixty-two million, two hundred two thousand, two hundred twenty-one".