13331431 has 2 divisors, whose sum is σ = 13331432. Its totient is φ = 13331430.

The previous prime is 13331429. The next prime is 13331441. The reversal of 13331431 is 13413331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13331431 - 2¹ = 13331429 is a prime.

It is a super-2 number, since 2×13331431² = 355454105015522, which contains 22 as substring.

Together with 13331429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13331399 and 13331408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665715 + 6665716.

It is an arithmetic number, because the mean of its divisors is an integer number (6665716).

Almost surely, 2^13331431 is an apocalyptic number.

13331431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331431 is an equidigital number, since it uses as much as digits as its factorization.

13331431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 19.

The square root of 13331431 is about 3651.2232196895. The cubic root of 13331431 is about 237.1149424351.

Adding to 13331431 its reverse (13413331), we get a palindrome (26744762).

The spelling of 13331431 in words is "thirteen million, three hundred thirty-one thousand, four hundred thirty-one".