13231140 has 48 divisors (see below), whose sum is σ = 39899328. Its totient is φ = 3256704.

The previous prime is 13231123. The next prime is 13231147. The reversal of 13231140 is 4113231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (13231147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7702 + ... + 9261.

It is an arithmetic number, because the mean of its divisors is an integer number (831236).

Almost surely, 2^13231140 is an apocalyptic number.

13231140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13231140 is an abundant number, since it is smaller than the sum of its proper divisors (26668188).

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

13231140 is a wasteful number, since it uses less digits than its factorization.

13231140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16988 (or 16986 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13231140 is about 3637.4634018777. The cubic root of 13231140 is about 236.5188479392.

Adding to 13231140 its reverse (4113231), we get a palindrome (17344371).

The spelling of 13231140 in words is "thirteen million, two hundred thirty-one thousand, one hundred forty".