13085431 has 2 divisors, whose sum is σ = 13085432. Its totient is φ = 13085430.

The previous prime is 13085407. The next prime is 13085447. The reversal of 13085431 is 13458031.

It is a strong prime.

It is an emirp because it is prime and its reverse (13458031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13085431 - 2⁵ = 13085399 is a prime.

It is a super-2 number, since 2×13085431² = 342457008911522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13085396 and 13085405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13085491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6542715 + 6542716.

It is an arithmetic number, because the mean of its divisors is an integer number (6542716).

Almost surely, 2^13085431 is an apocalyptic number.

13085431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13085431 is an equidigital number, since it uses as much as digits as its factorization.

13085431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13085431 is about 3617.3790235473. The cubic root of 13085431 is about 235.6474135020.

The spelling of 13085431 in words is "thirteen million, eighty-five thousand, four hundred thirty-one".