131343440240 has 40 divisors (see below), whose sum is σ = 323336648880. Its totient is φ = 49446941696.

The previous prime is 131343440237. The next prime is 131343440243. The reversal of 131343440240 is 42044343131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131343440237) and next prime (131343440243).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131343440243) 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, 48286670 + ... + 48289389.

It is an arithmetic number, because the mean of its divisors is an integer number (8083416222).

Almost surely, 2^131343440240 is an apocalyptic number.

131343440240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131343440240 is an abundant number, since it is smaller than the sum of its proper divisors (191993208640).

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

131343440240 is a wasteful number, since it uses less digits than its factorization.

131343440240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96576089 (or 96576083 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 131343440240 its reverse (42044343131), we get a palindrome (173387783371).

The spelling of 131343440240 in words is "one hundred thirty-one billion, three hundred forty-three million, four hundred forty thousand, two hundred forty".