22431243 has 16 divisors (see below), whose sum is σ = 30917376. Its totient is φ = 14458080.

The previous prime is 22431209. The next prime is 22431263. The reversal of 22431243 is 34213422.

It is not a de Polignac number, because 22431243 - 2⁸ = 22430987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22431263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10296 + ... + 12282.

It is an arithmetic number, because the mean of its divisors is an integer number (1932336).

Almost surely, 2^22431243 is an apocalyptic number.

22431243 is a deficient number, since it is larger than the sum of its proper divisors (8486133).

22431243 is a wasteful number, since it uses less digits than its factorization.

22431243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114.

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

The square root of 22431243 is about 4736.1633206637. The cubic root of 22431243 is about 282.0229471795.

Adding to 22431243 its reverse (34213422), we get a palindrome (56644665).

It can be divided in two parts, 2243 and 1243, that added together give a triangular number (3486 = T₈₃).

The spelling of 22431243 in words is "twenty-two million, four hundred thirty-one thousand, two hundred forty-three".