22455491 has 2 divisors, whose sum is σ = 22455492. Its totient is φ = 22455490.

The previous prime is 22455481. The next prime is 22455493. The reversal of 22455491 is 19455422.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22455491 is a prime.

Together with 22455493, 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 (22455493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11227745 + 11227746.

It is an arithmetic number, because the mean of its divisors is an integer number (11227746).

Almost surely, 2^22455491 is an apocalyptic number.

22455491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22455491 is an equidigital number, since it uses as much as digits as its factorization.

22455491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 22455491 is about 4738.7225071743. The cubic root of 22455491 is about 282.1245321248.

The spelling of 22455491 in words is "twenty-two million, four hundred fifty-five thousand, four hundred ninety-one".