12031431 has 16 divisors (see below), whose sum is σ = 16383360. Its totient is φ = 7852320.

The previous prime is 12031417. The next prime is 12031471. The reversal of 12031431 is 13413021.

12031431 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12031431 - 2¹³ = 12023239 is a prime.

It is a super-2 number, since 2×12031431² = 289510663815522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12031431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52425 + ... + 52653.

It is an arithmetic number, because the mean of its divisors is an integer number (1023960).

Almost surely, 2^12031431 is an apocalyptic number.

12031431 is a deficient number, since it is larger than the sum of its proper divisors (4351929).

12031431 is a wasteful number, since it uses less digits than its factorization.

12031431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 12031431 is about 3468.6353224287. The cubic root of 12031431 is about 229.1425604322.

Adding to 12031431 its reverse (13413021), we get a palindrome (25444452).

The spelling of 12031431 in words is "twelve million, thirty-one thousand, four hundred thirty-one".