252219217 has 2 divisors, whose sum is σ = 252219218. Its totient is φ = 252219216.

The previous prime is 252219211. The next prime is 252219221. The reversal of 252219217 is 712912252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143976001 + 108243216 = 11999^2 + 10404^2 .

It is a cyclic number.

It is not a de Polignac number, because 252219217 - 2²⁷ = 118001489 is a prime.

It is a super-2 number, since 2×252219217² = 127229066848186178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252219211) 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 as a sum of consecutive naturals, namely, 126109608 + 126109609.

It is an arithmetic number, because the mean of its divisors is an integer number (126109609).

Almost surely, 2^252219217 is an apocalyptic number.

It is an amenable number.

252219217 is a deficient number, since it is larger than the sum of its proper divisors (1).

252219217 is an equidigital number, since it uses as much as digits as its factorization.

252219217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 252219217 is about 15881.4110519185. The cubic root of 252219217 is about 631.8190618937.

The spelling of 252219217 in words is "two hundred fifty-two million, two hundred nineteen thousand, two hundred seventeen".