13320431 has 2 divisors, whose sum is σ = 13320432. Its totient is φ = 13320430.

The previous prime is 13320409. The next prime is 13320443. The reversal of 13320431 is 13402331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13320431 is a prime.

It is a super-2 number, since 2×13320431² = 354867764051522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13320491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660215 + 6660216.

It is an arithmetic number, because the mean of its divisors is an integer number (6660216).

Almost surely, 2^13320431 is an apocalyptic number.

13320431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13320431 is an equidigital number, since it uses as much as digits as its factorization.

13320431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 13320431 is about 3649.7165643376. The cubic root of 13320431 is about 237.0497085761.

Adding to 13320431 its reverse (13402331), we get a palindrome (26722762).

The spelling of 13320431 in words is "thirteen million, three hundred twenty thousand, four hundred thirty-one".