22981579 has 2 divisors, whose sum is σ = 22981580. Its totient is φ = 22981578.

The previous prime is 22981573. The next prime is 22981591. The reversal of 22981579 is 97518922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22981579 - 2⁵ = 22981547 is a prime.

It is not a weakly prime, because it can be changed into another prime (22981573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11490789 + 11490790.

It is an arithmetic number, because the mean of its divisors is an integer number (11490790).

Almost surely, 2^22981579 is an apocalyptic number.

22981579 is a deficient number, since it is larger than the sum of its proper divisors (1).

22981579 is an equidigital number, since it uses as much as digits as its factorization.

22981579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 22981579 is about 4793.9106166052. The cubic root of 22981579 is about 284.3107547016.

The spelling of 22981579 in words is "twenty-two million, nine hundred eighty-one thousand, five hundred seventy-nine".