222320591 has 2 divisors, whose sum is σ = 222320592. Its totient is φ = 222320590.

The previous prime is 222320569. The next prime is 222320597. The reversal of 222320591 is 195023222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222320591 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222320591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222320597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111160295 + 111160296.

It is an arithmetic number, because the mean of its divisors is an integer number (111160296).

Almost surely, 2^222320591 is an apocalyptic number.

222320591 is a deficient number, since it is larger than the sum of its proper divisors (1).

222320591 is an equidigital number, since it uses as much as digits as its factorization.

222320591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 222320591 is about 14910.4188740625. The cubic root of 222320591 is about 605.7962250591.

The spelling of 222320591 in words is "two hundred twenty-two million, three hundred twenty thousand, five hundred ninety-one".