22431439 has 2 divisors, whose sum is σ = 22431440. Its totient is φ = 22431438.

The previous prime is 22431433. The next prime is 22431473. The reversal of 22431439 is 93413422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22431439 - 2⁹ = 22430927 is a prime.

It is a super-2 number, since 2×22431439² = 1006338911221442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22431433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11215719 + 11215720.

It is an arithmetic number, because the mean of its divisors is an integer number (11215720).

Almost surely, 2^22431439 is an apocalyptic number.

22431439 is a deficient number, since it is larger than the sum of its proper divisors (1).

22431439 is an equidigital number, since it uses as much as digits as its factorization.

22431439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 22431439 is about 4736.1840124725. The cubic root of 22431439 is about 282.0237685983.

The spelling of 22431439 in words is "twenty-two million, four hundred thirty-one thousand, four hundred thirty-nine".