13231095840 has 144 divisors (see below), whose sum is σ = 45183699288. Its totient is φ = 3525746688.

The previous prime is 13231095817. The next prime is 13231095847. The reversal of 13231095840 is 4859013231.

It can be written as a sum of positive squares in 4 ways, for example, as 6014933136 + 7216162704 = 77556^2 + 84948^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13231095795 and 13231095804.

It is not an unprimeable number, because it can be changed into a prime (13231095847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2838792 + ... + 2843448.

Almost surely, 2^13231095840 is an apocalyptic number.

13231095840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13231095840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22591849644).

13231095840 is an abundant number, since it is smaller than the sum of its proper divisors (31952603448).

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

13231095840 is a wasteful number, since it uses less digits than its factorization.

13231095840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6651 (or 6640 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

It can be divided in two parts, 132310 and 95840, that added together give a triangular number (228150 = T₆₇₅).

The spelling of 13231095840 in words is "thirteen billion, two hundred thirty-one million, ninety-five thousand, eight hundred forty".