22110997 has 2 divisors, whose sum is σ = 22110998. Its totient is φ = 22110996.

The previous prime is 22110989. The next prime is 22111007. The reversal of 22110997 is 79901122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12432676 + 9678321 = 3526^2 + 3111^2 .

It is a cyclic number.

It is not a de Polignac number, because 22110997 - 2³ = 22110989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22110947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055498 + 11055499.

It is an arithmetic number, because the mean of its divisors is an integer number (11055499).

Almost surely, 2^22110997 is an apocalyptic number.

It is an amenable number.

22110997 is a deficient number, since it is larger than the sum of its proper divisors (1).

22110997 is an equidigital number, since it uses as much as digits as its factorization.

22110997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 22110997 is about 4702.2331928563. The cubic root of 22110997 is about 280.6743820947.

The spelling of 22110997 in words is "twenty-two million, one hundred ten thousand, nine hundred ninety-seven".