12240331 has 4 divisors (see below), whose sum is σ = 12267232. Its totient is φ = 12213432.

The previous prime is 12240311. The next prime is 12240341. The reversal of 12240331 is 13304221.

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: 13304221 = 7 ⋅1900603.

It is a cyclic number.

It is not a de Polignac number, because 12240331 - 2⁵ = 12240299 is a prime.

It is a super-2 number, since 2×12240331² = 299651405979122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12240311) 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, 12756 + ... + 13681.

It is an arithmetic number, because the mean of its divisors is an integer number (3066808).

Almost surely, 2^12240331 is an apocalyptic number.

12240331 is a deficient number, since it is larger than the sum of its proper divisors (26901).

12240331 is an equidigital number, since it uses as much as digits as its factorization.

12240331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26900.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 12240331 is about 3498.6184416138. The cubic root of 12240331 is about 230.4611478787.

Adding to 12240331 its reverse (13304221), we get a palindrome (25544552).

The spelling of 12240331 in words is "twelve million, two hundred forty thousand, three hundred thirty-one".