222212689 has 2 divisors, whose sum is σ = 222212690. Its totient is φ = 222212688.

The previous prime is 222212687. The next prime is 222212699. The reversal of 222212689 is 986212222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210482064 + 11730625 = 14508^2 + 3425^2 .

It is a cyclic number.

It is not a de Polignac number, because 222212689 - 2¹ = 222212687 is a prime.

It is a super-2 number, since 2×222212689² = 98756958305221442, which contains 22 as substring.

Together with 222212687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (222212687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111106344 + 111106345.

It is an arithmetic number, because the mean of its divisors is an integer number (111106345).

Almost surely, 2^222212689 is an apocalyptic number.

It is an amenable number.

222212689 is a deficient number, since it is larger than the sum of its proper divisors (1).

222212689 is an equidigital number, since it uses as much as digits as its factorization.

222212689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 222212689 is about 14906.8000925752. The cubic root of 222212689 is about 605.6982026463.

The spelling of 222212689 in words is "two hundred twenty-two million, two hundred twelve thousand, six hundred eighty-nine".