222126491 has 2 divisors, whose sum is σ = 222126492. Its totient is φ = 222126490.

The previous prime is 222126469. The next prime is 222126493. The reversal of 222126491 is 194621222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222126491 - 2²⁶ = 155017627 is a prime.

It is a Sophie Germain prime.

Together with 222126493, 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 (222126493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111063245 + 111063246.

It is an arithmetic number, because the mean of its divisors is an integer number (111063246).

Almost surely, 2^222126491 is an apocalyptic number.

222126491 is a deficient number, since it is larger than the sum of its proper divisors (1).

222126491 is an equidigital number, since it uses as much as digits as its factorization.

222126491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 222126491 is about 14903.9085813085. The cubic root of 222126491 is about 605.6198741970.

The spelling of 222126491 in words is "two hundred twenty-two million, one hundred twenty-six thousand, four hundred ninety-one".