22604431 has 2 divisors, whose sum is σ = 22604432. Its totient is φ = 22604430.

The previous prime is 22604419. The next prime is 22604453. The reversal of 22604431 is 13440622.

It is a happy number.

It is an a-pointer prime, because the next prime (22604453) can be obtained adding 22604431 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22604431 - 2⁵ = 22604399 is a prime.

It is a super-2 number, since 2×22604431² = 1021920601667522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22604531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11302215 + 11302216.

It is an arithmetic number, because the mean of its divisors is an integer number (11302216).

Almost surely, 2^22604431 is an apocalyptic number.

22604431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22604431 is an equidigital number, since it uses as much as digits as its factorization.

22604431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 22604431 is about 4754.4117406889. The cubic root of 22604431 is about 282.7469050338.

The spelling of 22604431 in words is "twenty-two million, six hundred four thousand, four hundred thirty-one".