22281923 has 2 divisors, whose sum is σ = 22281924. Its totient is φ = 22281922.

The previous prime is 22281877. The next prime is 22281943. The reversal of 22281923 is 32918222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22281923 - 2⁸ = 22281667 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22281943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11140961 + 11140962.

It is an arithmetic number, because the mean of its divisors is an integer number (11140962).

Almost surely, 2^22281923 is an apocalyptic number.

22281923 is a deficient number, since it is larger than the sum of its proper divisors (1).

22281923 is an equidigital number, since it uses as much as digits as its factorization.

22281923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 22281923 is about 4720.3731843997. The cubic root of 22281923 is about 281.3957645726.

The spelling of 22281923 in words is "twenty-two million, two hundred eighty-one thousand, nine hundred twenty-three".