13231660 has 24 divisors (see below), whose sum is σ = 29924496. Its totient is φ = 4885440.

The previous prime is 13231651. The next prime is 13231667. The reversal of 13231660 is 6613231.

13231660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13231667) 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, 25186 + ... + 25705.

It is an arithmetic number, because the mean of its divisors is an integer number (1246854).

Almost surely, 2^13231660 is an apocalyptic number.

13231660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13231660 is an abundant number, since it is smaller than the sum of its proper divisors (16692836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13231660 is a wasteful number, since it uses less digits than its factorization.

13231660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50913 (or 50911 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13231660 is about 3637.5348795579. The cubic root of 13231660 is about 236.5219463921.

Adding to 13231660 its reverse (6613231), we get a palindrome (19844891).

The spelling of 13231660 in words is "thirteen million, two hundred thirty-one thousand, six hundred sixty".