13985231 has 4 divisors (see below), whose sum is σ = 15061032. Its totient is φ = 12909432.

The previous prime is 13985189. The next prime is 13985233. The reversal of 13985231 is 13258931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13985231 - 2¹⁴ = 13968847 is a prime.

It is a super-2 number, since 2×13985231² = 391173372246722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13985233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537881 + ... + 537906.

It is an arithmetic number, because the mean of its divisors is an integer number (3765258).

Almost surely, 2^13985231 is an apocalyptic number.

13985231 is a deficient number, since it is larger than the sum of its proper divisors (1075801).

13985231 is a wasteful number, since it uses less digits than its factorization.

13985231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075800.

The product of its digits is 6480, while the sum is 32.

The square root of 13985231 is about 3739.6832753590. The cubic root of 13985231 is about 240.9294456668.

The spelling of 13985231 in words is "thirteen million, nine hundred eighty-five thousand, two hundred thirty-one".