22312091 has 2 divisors, whose sum is σ = 22312092. Its totient is φ = 22312090.

The previous prime is 22312067. The next prime is 22312097. The reversal of 22312091 is 19021322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22312091 is a prime.

It is a super-3 number, since 3×22312091³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22312097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11156045 + 11156046.

It is an arithmetic number, because the mean of its divisors is an integer number (11156046).

Almost surely, 2^22312091 is an apocalyptic number.

22312091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22312091 is an equidigital number, since it uses as much as digits as its factorization.

22312091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 22312091 is about 4723.5676135735. The cubic root of 22312091 is about 281.5227033335.

The spelling of 22312091 in words is "twenty-two million, three hundred twelve thousand, ninety-one".