252225321 has 4 divisors (see below), whose sum is σ = 336300432. Its totient is φ = 168150212.

The previous prime is 252225313. The next prime is 252225329. The reversal of 252225321 is 123522252.

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 an interprime number because it is at equal distance from previous prime (252225313) and next prime (252225329).

It is a cyclic number.

It is not a de Polignac number, because 252225321 - 2³ = 252225313 is a prime.

It is a super-2 number, since 2×252225321² = 127235225107106082, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 252225291 and 252225300.

It is not an unprimeable number, because it can be changed into a prime (252225329) 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, 42037551 + ... + 42037556.

It is an arithmetic number, because the mean of its divisors is an integer number (84075108).

Almost surely, 2^252225321 is an apocalyptic number.

It is an amenable number.

252225321 is a deficient number, since it is larger than the sum of its proper divisors (84075111).

252225321 is an equidigital number, since it uses as much as digits as its factorization.

252225321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84075110.

The product of its digits is 2400, while the sum is 24.

The square root of 252225321 is about 15881.6032251155. The cubic root of 252225321 is about 631.8241587727.

Adding to 252225321 its reverse (123522252), we get a palindrome (375747573).

The spelling of 252225321 in words is "two hundred fifty-two million, two hundred twenty-five thousand, three hundred twenty-one".