22655491 has 2 divisors, whose sum is σ = 22655492. Its totient is φ = 22655490.

The previous prime is 22655489. The next prime is 22655519. The reversal of 22655491 is 19455622.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22655491 - 2¹ = 22655489 is a prime.

Together with 22655489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22655401) 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, 11327745 + 11327746.

It is an arithmetic number, because the mean of its divisors is an integer number (11327746).

Almost surely, 2^22655491 is an apocalyptic number.

22655491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22655491 is an equidigital number, since it uses as much as digits as its factorization.

22655491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 22655491 is about 4759.7784612312. The cubic root of 22655491 is about 282.9596391391.

The spelling of 22655491 in words is "twenty-two million, six hundred fifty-five thousand, four hundred ninety-one".