22881791 has 2 divisors, whose sum is σ = 22881792. Its totient is φ = 22881790.

The previous prime is 22881787. The next prime is 22881821. The reversal of 22881791 is 19718822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22881791 - 2² = 22881787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22881701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11440895 + 11440896.

It is an arithmetic number, because the mean of its divisors is an integer number (11440896).

Almost surely, 2^22881791 is an apocalyptic number.

22881791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22881791 is an equidigital number, since it uses as much as digits as its factorization.

22881791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 38.

The square root of 22881791 is about 4783.4915072570. The cubic root of 22881791 is about 283.8986570566.

The spelling of 22881791 in words is "twenty-two million, eight hundred eighty-one thousand, seven hundred ninety-one".