22242431 has 4 divisors (see below), whose sum is σ = 22446600. Its totient is φ = 22038264.

The previous prime is 22242427. The next prime is 22242433. The reversal of 22242431 is 13424222.

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

It is a cyclic number.

It is not a de Polignac number, because 22242431 - 2² = 22242427 is a prime.

It is a super-2 number, since 2×22242431² = 989451473579522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22242433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101921 + ... + 102138.

It is an arithmetic number, because the mean of its divisors is an integer number (5611650).

Almost surely, 2^22242431 is an apocalyptic number.

22242431 is a deficient number, since it is larger than the sum of its proper divisors (204169).

22242431 is a wasteful number, since it uses less digits than its factorization.

22242431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204168.

The product of its digits is 768, while the sum is 20.

The square root of 22242431 is about 4716.1881853887. The cubic root of 22242431 is about 281.2294196628.

Adding to 22242431 its reverse (13424222), we get a palindrome (35666653).

The spelling of 22242431 in words is "twenty-two million, two hundred forty-two thousand, four hundred thirty-one".