252221313 has 16 divisors (see below), whose sum is σ = 343506240. Its totient is φ = 164579904.

The previous prime is 252221309. The next prime is 252221339. The reversal of 252221313 is 313122252.

It is not a de Polignac number, because 252221313 - 2² = 252221309 is a prime.

It is a super-3 number, since 3×252221313³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 252221313.

It is not an unprimeable number, because it can be changed into a prime (252221303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22495 + ... + 31787.

It is an arithmetic number, because the mean of its divisors is an integer number (21469140).

Almost surely, 2^252221313 is an apocalyptic number.

It is an amenable number.

252221313 is a deficient number, since it is larger than the sum of its proper divisors (91284927).

252221313 is a wasteful number, since it uses less digits than its factorization.

252221313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9488.

The product of its digits is 720, while the sum is 21.

The square root of 252221313 is about 15881.4770408800. The cubic root of 252221313 is about 631.8208120764.

Adding to 252221313 its reverse (313122252), we get a palindrome (565343565).

The spelling of 252221313 in words is "two hundred fifty-two million, two hundred twenty-one thousand, three hundred thirteen".