13385431 has 2 divisors, whose sum is σ = 13385432. Its totient is φ = 13385430.

The previous prime is 13385423. The next prime is 13385531. The reversal of 13385431 is 13458331.

It is a weak prime.

It is an emirp because it is prime and its reverse (13458331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13385431 - 2³ = 13385423 is a prime.

It is a super-2 number, since 2×13385431² = 358339526111522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13385431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13385401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6692715 + 6692716.

It is an arithmetic number, because the mean of its divisors is an integer number (6692716).

Almost surely, 2^13385431 is an apocalyptic number.

13385431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13385431 is an equidigital number, since it uses as much as digits as its factorization.

13385431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 13385431 is about 3658.6105286024. The cubic root of 13385431 is about 237.4346619897.

Subtracting 13385431 from its reverse (13458331), we obtain a square (72900 = 270²).

The spelling of 13385431 in words is "thirteen million, three hundred eighty-five thousand, four hundred thirty-one".