22812791 has 2 divisors, whose sum is σ = 22812792. Its totient is φ = 22812790.

The previous prime is 22812767. The next prime is 22812809. The reversal of 22812791 is 19721822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22812791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22812731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11406395 + 11406396.

It is an arithmetic number, because the mean of its divisors is an integer number (11406396).

Almost surely, 2^22812791 is an apocalyptic number.

22812791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22812791 is an equidigital number, since it uses as much as digits as its factorization.

22812791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 22812791 is about 4776.2737568108. The cubic root of 22812791 is about 283.6130044374.

The spelling of 22812791 in words is "twenty-two million, eight hundred twelve thousand, seven hundred ninety-one".