12213431 has 8 divisors (see below), whose sum is σ = 12405120. Its totient is φ = 12023352.

The previous prime is 12213403. The next prime is 12213469. The reversal of 12213431 is 13431221.

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

It is a cyclic number.

It is not a de Polignac number, because 12213431 - 2¹⁰ = 12212407 is a prime.

It is a super-2 number, since 2×12213431² = 298335793583522, 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 (12213401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28940 + ... + 29358.

It is an arithmetic number, because the mean of its divisors is an integer number (1550640).

Almost surely, 2^12213431 is an apocalyptic number.

12213431 is a deficient number, since it is larger than the sum of its proper divisors (191689).

12213431 is a wasteful number, since it uses less digits than its factorization.

12213431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its digits is 144, while the sum is 17.

The square root of 12213431 is about 3494.7719525028. The cubic root of 12213431 is about 230.2921995115.

Adding to 12213431 its reverse (13431221), we get a palindrome (25644652).

The spelling of 12213431 in words is "twelve million, two hundred thirteen thousand, four hundred thirty-one".