252120211 has 4 divisors (see below), whose sum is σ = 288137392. Its totient is φ = 216103032.

The previous prime is 252120203. The next prime is 252120233. The reversal of 252120211 is 112021252.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 252120211 - 2³ = 252120203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252130211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18008580 + ... + 18008593.

It is an arithmetic number, because the mean of its divisors is an integer number (72034348).

Almost surely, 2^252120211 is an apocalyptic number.

252120211 is a deficient number, since it is larger than the sum of its proper divisors (36017181).

252120211 is an equidigital number, since it uses as much as digits as its factorization.

252120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36017180.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 252120211 is about 15878.2937055592. The cubic root of 252120211 is about 631.7363797657.

Adding to 252120211 its reverse (112021252), we get a palindrome (364141463).

The spelling of 252120211 in words is "two hundred fifty-two million, one hundred twenty thousand, two hundred eleven".