22554491 has 2 divisors, whose sum is σ = 22554492. Its totient is φ = 22554490.

The previous prime is 22554479. The next prime is 22554509. The reversal of 22554491 is 19445522.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22554491 is a prime.

It is not a weakly prime, because it can be changed into another prime (22554991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11277245 + 11277246.

It is an arithmetic number, because the mean of its divisors is an integer number (11277246).

Almost surely, 2^22554491 is an apocalyptic number.

22554491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22554491 is an equidigital number, since it uses as much as digits as its factorization.

22554491 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 22554491 is about 4749.1568725406. The cubic root of 22554491 is about 282.5385271286.

The spelling of 22554491 in words is "twenty-two million, five hundred fifty-four thousand, four hundred ninety-one".