13591431 has 12 divisors (see below), whose sum is σ = 22436752. Its totient is φ = 7766496.

The previous prime is 13591427. The next prime is 13591439. The reversal of 13591431 is 13419531.

It is not a de Polignac number, because 13591431 - 2² = 13591427 is a prime.

It is a super-2 number, since 2×13591431² = 369453993255522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13591395 and 13591404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13591439) 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, 107806 + ... + 107931.

Almost surely, 2^13591431 is an apocalyptic number.

13591431 is a deficient number, since it is larger than the sum of its proper divisors (8845321).

13591431 is a wasteful number, since it uses less digits than its factorization.

13591431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215750 (or 215747 counting only the distinct ones).

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

The square root of 13591431 is about 3686.6558016718. The cubic root of 13591431 is about 238.6464957083.

The spelling of 13591431 in words is "thirteen million, five hundred ninety-one thousand, four hundred thirty-one".