252122251 has 4 divisors (see below), whose sum is σ = 263084112. Its totient is φ = 241160392.

The previous prime is 252122249. The next prime is 252122261. The reversal of 252122251 is 152221252.

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 252122251 - 2¹ = 252122249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252122261) 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, 5480896 + ... + 5480941.

It is an arithmetic number, because the mean of its divisors is an integer number (65771028).

Almost surely, 2^252122251 is an apocalyptic number.

252122251 is a deficient number, since it is larger than the sum of its proper divisors (10961861).

252122251 is a wasteful number, since it uses less digits than its factorization.

252122251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10961860.

The product of its digits is 800, while the sum is 22.

The square root of 252122251 is about 15878.3579440697. The cubic root of 252122251 is about 631.7380836338.

Subtracting from 252122251 its reverse (152221252), we obtain a palindrome (99900999).

The spelling of 252122251 in words is "two hundred fifty-two million, one hundred twenty-two thousand, two hundred fifty-one".