2222222491 has 2 divisors, whose sum is σ = 2222222492. Its totient is φ = 2222222490.

The previous prime is 2222222489. The next prime is 2222222549. The reversal of 2222222491 is 1942222222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2222222491 - 2¹ = 2222222489 is a prime.

Together with 2222222489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2222222291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111111245 + 1111111246.

It is an arithmetic number, because the mean of its divisors is an integer number (1111111246).

Almost surely, 2^2222222491 is an apocalyptic number.

2222222491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222222491 is an equidigital number, since it uses as much as digits as its factorization.

2222222491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

The square root of 2222222491 is about 47140.4549299219. The cubic root of 2222222491 is about 1304.9559330011.

The spelling of 2222222491 in words is "two billion, two hundred twenty-two million, two hundred twenty-two thousand, four hundred ninety-one".