22389931 has 2 divisors, whose sum is σ = 22389932. Its totient is φ = 22389930.

The previous prime is 22389929. The next prime is 22389937. The reversal of 22389931 is 13998322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22389931 - 2¹ = 22389929 is a prime.

It is a super-2 number, since 2×22389931² = 1002618020369522, which contains 22 as substring.

Together with 22389929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22389937) 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, 11194965 + 11194966.

It is an arithmetic number, because the mean of its divisors is an integer number (11194966).

Almost surely, 2^22389931 is an apocalyptic number.

22389931 is a deficient number, since it is larger than the sum of its proper divisors (1).

22389931 is an equidigital number, since it uses as much as digits as its factorization.

22389931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 22389931 is about 4731.7999746397. The cubic root of 22389931 is about 281.8497053029.

The spelling of 22389931 in words is "twenty-two million, three hundred eighty-nine thousand, nine hundred thirty-one".