22505111 has 2 divisors, whose sum is σ = 22505112. Its totient is φ = 22505110.

The previous prime is 22505089. The next prime is 22505113. The reversal of 22505111 is 11150522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22505111 - 2⁶ = 22505047 is a prime.

It is a super-2 number, since 2×22505111² = 1012960042244642, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 22505113, it forms a pair of twin primes.

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 22505111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22505113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11252555 + 11252556.

It is an arithmetic number, because the mean of its divisors is an integer number (11252556).

Almost surely, 2^22505111 is an apocalyptic number.

22505111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22505111 is an equidigital number, since it uses as much as digits as its factorization.

22505111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 22505111 is about 4743.9552063653. The cubic root of 22505111 is about 282.3321832021.

Adding to 22505111 its reverse (11150522), we get a palindrome (33655633).

The spelling of 22505111 in words is "twenty-two million, five hundred five thousand, one hundred eleven".