13233431 has 4 divisors (see below), whose sum is σ = 13302192. Its totient is φ = 13164672.

The previous prime is 13233413. The next prime is 13233433. The reversal of 13233431 is 13433231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13233431 is a prime.

It is a super-2 number, since 2×13233431² = 350247392063522, 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 (13233433) 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, 34091 + ... + 34476.

It is an arithmetic number, because the mean of its divisors is an integer number (3325548).

Almost surely, 2^13233431 is an apocalyptic number.

13233431 is a deficient number, since it is larger than the sum of its proper divisors (68761).

13233431 is an equidigital number, since it uses as much as digits as its factorization.

13233431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68760.

The product of its digits is 648, while the sum is 20.

The square root of 13233431 is about 3637.7783055046. The cubic root of 13233431 is about 236.5324983984.

Adding to 13233431 its reverse (13433231), we get a palindrome (26666662).

The spelling of 13233431 in words is "thirteen million, two hundred thirty-three thousand, four hundred thirty-one".