13231985 has 8 divisors (see below), whose sum is σ = 17099880. Its totient is φ = 9771264.

The previous prime is 13231973. The next prime is 13231987. The reversal of 13231985 is 58913231.

It can be written as a sum of positive squares in 4 ways, for example, as 565504 + 12666481 = 752^2 + 3559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13231985 - 2⁶ = 13231921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13231987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101720 + ... + 101849.

It is an arithmetic number, because the mean of its divisors is an integer number (2137485).

Almost surely, 2^13231985 is an apocalyptic number.

It is an amenable number.

13231985 is a deficient number, since it is larger than the sum of its proper divisors (3867895).

13231985 is a wasteful number, since it uses less digits than its factorization.

13231985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203587.

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

The square root of 13231985 is about 3637.5795523947. The cubic root of 13231985 is about 236.5238828839.

The spelling of 13231985 in words is "thirteen million, two hundred thirty-one thousand, nine hundred eighty-five".