222591449 has 2 divisors, whose sum is σ = 222591450. Its totient is φ = 222591448.

The previous prime is 222591431. The next prime is 222591451. The reversal of 222591449 is 944195222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155875225 + 66716224 = 12485^2 + 8168^2 .

It is a cyclic number.

It is not a de Polignac number, because 222591449 - 2²⁰ = 221542873 is a prime.

Together with 222591451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222591409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111295724 + 111295725.

It is an arithmetic number, because the mean of its divisors is an integer number (111295725).

Almost surely, 2^222591449 is an apocalyptic number.

It is an amenable number.

222591449 is a deficient number, since it is larger than the sum of its proper divisors (1).

222591449 is an equidigital number, since it uses as much as digits as its factorization.

222591449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 222591449 is about 14919.4989527129. The cubic root of 222591449 is about 606.0421434455.

The spelling of 222591449 in words is "two hundred twenty-two million, five hundred ninety-one thousand, four hundred forty-nine".