13431591 has 12 divisors (see below), whose sum is σ = 19480032. Its totient is φ = 8918016.

The previous prime is 13431589. The next prime is 13431599. The reversal of 13431591 is 19513431.

It is not a de Polignac number, because 13431591 - 2¹ = 13431589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 591 + ... + 5216.

It is an arithmetic number, because the mean of its divisors is an integer number (1623336).

Almost surely, 2^13431591 is an apocalyptic number.

13431591 is a deficient number, since it is larger than the sum of its proper divisors (6048441).

13431591 is a wasteful number, since it uses less digits than its factorization.

13431591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6070 (or 6067 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 13431591 is about 3664.9135051185. The cubic root of 13431591 is about 237.7072820118.

The spelling of 13431591 in words is "thirteen million, four hundred thirty-one thousand, five hundred ninety-one".