131020140343240 has 32 divisors (see below), whose sum is σ = 294801698160000. Its totient is φ = 52406921490624.

The previous prime is 131020140343231. The next prime is 131020140343243. The reversal of 131020140343240 is 42343041020131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131020140343199 and 131020140343208.

It is not an unprimeable number, because it can be changed into a prime (131020140343243) 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, 33585840 + ... + 37283359.

It is an arithmetic number, because the mean of its divisors is an integer number (9212553067500).

Almost surely, 2^{131020140343240} is an apocalyptic number.

131020140343240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131020140343240 is an abundant number, since it is smaller than the sum of its proper divisors (163781557816760).

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

131020140343240 is a wasteful number, since it uses less digits than its factorization.

131020140343240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70915429 (or 70915425 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 131020140343240 its reverse (42343041020131), we get a palindrome (173363181363371).

The spelling of 131020140343240 in words is "one hundred thirty-one trillion, twenty billion, one hundred forty million, three hundred forty-three thousand, two hundred forty".