252217213 has 2 divisors, whose sum is σ = 252217214. Its totient is φ = 252217212.

The previous prime is 252217211. The next prime is 252217289. The reversal of 252217213 is 312712252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197486809 + 54730404 = 14053^2 + 7398^2 .

It is a cyclic number.

It is not a de Polignac number, because 252217213 - 2¹ = 252217211 is a prime.

It is a super-2 number, since 2×252217213² = 127227045066974738, which contains 22 as substring.

Together with 252217211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252217211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126108606 + 126108607.

It is an arithmetic number, because the mean of its divisors is an integer number (126108607).

Almost surely, 2^252217213 is an apocalyptic number.

It is an amenable number.

252217213 is a deficient number, since it is larger than the sum of its proper divisors (1).

252217213 is an equidigital number, since it uses as much as digits as its factorization.

252217213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 252217213 is about 15881.3479591627. The cubic root of 252217213 is about 631.8173885230.

Adding to 252217213 its reverse (312712252), we get a palindrome (564929465).

The spelling of 252217213 in words is "two hundred fifty-two million, two hundred seventeen thousand, two hundred thirteen".