12312331 has 2 divisors, whose sum is σ = 12312332. Its totient is φ = 12312330.

The previous prime is 12312283. The next prime is 12312347. The reversal of 12312331 is 13321321.

It is an a-pointer prime, because the next prime (12312347) can be obtained adding 12312331 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12312331 - 2¹³ = 12304139 is a prime.

It is a super-2 number, since 2×12312331² = 303186989307122, which contains 22 as substring.

It is a zygodrome in base 5.

It is not a weakly prime, because it can be changed into another prime (12312031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156165 + 6156166.

It is an arithmetic number, because the mean of its divisors is an integer number (6156166).

Almost surely, 2^12312331 is an apocalyptic number.

12312331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312331 is an equidigital number, since it uses as much as digits as its factorization.

12312331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 16.

The square root of 12312331 is about 3508.8931303190. The cubic root of 12312331 is about 230.9121371464.

Adding to 12312331 its reverse (13321321), we get a palindrome (25633652).

The spelling of 12312331 in words is "twelve million, three hundred twelve thousand, three hundred thirty-one".