12222431 has 8 divisors (see below), whose sum is σ = 13264944. Its totient is φ = 11194560.

The previous prime is 12222403. The next prime is 12222433. The reversal of 12222431 is 13422221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12222431 - 2⁶ = 12222367 is a prime.

It is a super-2 number, since 2×12222431² = 298775639099522, 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 (12222433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1886 + ... + 5291.

It is an arithmetic number, because the mean of its divisors is an integer number (1658118).

Almost surely, 2^12222431 is an apocalyptic number.

12222431 is a deficient number, since it is larger than the sum of its proper divisors (1042513).

12222431 is a wasteful number, since it uses less digits than its factorization.

12222431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7321.

The product of its digits is 192, while the sum is 17.

The square root of 12222431 is about 3496.0593530431. The cubic root of 12222431 is about 230.3487525773.

Adding to 12222431 its reverse (13422221), we get a palindrome (25644652).

The spelling of 12222431 in words is "twelve million, two hundred twenty-two thousand, four hundred thirty-one".