22423431 has 4 divisors (see below), whose sum is σ = 29897912. Its totient is φ = 14948952.

The previous prime is 22423403. The next prime is 22423441. The reversal of 22423431 is 13432422.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22423431 - 2⁹ = 22422919 is a prime.

It is a super-2 number, since 2×22423431² = 1005620515623522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22423398 and 22423407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22423441) 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 in 3 ways as a sum of consecutive naturals, for example, 3737236 + ... + 3737241.

It is an arithmetic number, because the mean of its divisors is an integer number (7474478).

Almost surely, 2^22423431 is an apocalyptic number.

22423431 is a deficient number, since it is larger than the sum of its proper divisors (7474481).

22423431 is an equidigital number, since it uses as much as digits as its factorization.

22423431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7474480.

The product of its digits is 1152, while the sum is 21.

The square root of 22423431 is about 4735.3385306649. The cubic root of 22423431 is about 281.9902038748.

Adding to 22423431 its reverse (13432422), we get a palindrome (35855853).

The spelling of 22423431 in words is "twenty-two million, four hundred twenty-three thousand, four hundred thirty-one".