222297391 has 2 divisors, whose sum is σ = 222297392. Its totient is φ = 222297390.

The previous prime is 222297377. The next prime is 222297407. The reversal of 222297391 is 193792222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222297391 - 2¹⁹ = 221773103 is a prime.

It is a super-2 number, since 2×222297391² = 98832260090813762, which contains 22 as substring.

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 222297391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222297091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111148695 + 111148696.

It is an arithmetic number, because the mean of its divisors is an integer number (111148696).

Almost surely, 2^222297391 is an apocalyptic number.

222297391 is a deficient number, since it is larger than the sum of its proper divisors (1).

222297391 is an equidigital number, since it uses as much as digits as its factorization.

222297391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 222297391 is about 14909.6408742800. The cubic root of 222297391 is about 605.7751519453.

The spelling of 222297391 in words is "two hundred twenty-two million, two hundred ninety-seven thousand, three hundred ninety-one".