13311431 has 8 divisors (see below), whose sum is σ = 15704064. Its totient is φ = 11041560.

The previous prime is 13311413. The next prime is 13311433. The reversal of 13311431 is 13411331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13311431 - 2⁶ = 13311367 is a prime.

It is a super-2 number, since 2×13311431² = 354388390535522, 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 (13311433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30455 + ... + 30888.

It is an arithmetic number, because the mean of its divisors is an integer number (1963008).

Almost surely, 2^13311431 is an apocalyptic number.

13311431 is a deficient number, since it is larger than the sum of its proper divisors (2392633).

13311431 is an equidigital number, since it uses as much as digits as its factorization.

13311431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61381.

The product of its digits is 108, while the sum is 17.

The square root of 13311431 is about 3648.4833835445. The cubic root of 13311431 is about 236.9963087012.

Adding to 13311431 its reverse (13411331), we get a palindrome (26722762).

The spelling of 13311431 in words is "thirteen million, three hundred eleven thousand, four hundred thirty-one".