12320031 has 4 divisors (see below), whose sum is σ = 16426712. Its totient is φ = 8213352.

The previous prime is 12320023. The next prime is 12320047. The reversal of 12320031 is 13002321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13002321 = 3 ⋅4334107.

It is not a de Polignac number, because 12320031 - 2³ = 12320023 is a prime.

It is a super-2 number, since 2×12320031² = 303566327681922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12319989 and 12320016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053336 + ... + 2053341.

It is an arithmetic number, because the mean of its divisors is an integer number (4106678).

Almost surely, 2^12320031 is an apocalyptic number.

12320031 is a deficient number, since it is larger than the sum of its proper divisors (4106681).

12320031 is an equidigital number, since it uses as much as digits as its factorization.

12320031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106680.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 12320031 is about 3509.9901709264. The cubic root of 12320031 is about 230.9602637747.

Adding to 12320031 its reverse (13002321), we get a palindrome (25322352).

The spelling of 12320031 in words is "twelve million, three hundred twenty thousand, thirty-one".