131020443431240 has 128 divisors (see below), whose sum is σ = 341251673051520. Its totient is φ = 44743950643200.

The previous prime is 131020443431231. The next prime is 131020443431243. The reversal of 131020443431240 is 42134344020131.

It is a junction number, because it is equal to n+sod(n) for n = 131020443431197 and 131020443431206.

It is not an unprimeable number, because it can be changed into a prime (131020443431243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15549662 + ... + 22446221.

It is an arithmetic number, because the mean of its divisors is an integer number (2666028695715).

Almost surely, 2^{131020443431240} is an apocalyptic number.

131020443431240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131020443431240 is an abundant number, since it is smaller than the sum of its proper divisors (210231229620280).

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

131020443431240 is a wasteful number, since it uses less digits than its factorization.

131020443431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37996383 (or 37996379 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 131020443431240 its reverse (42134344020131), we get a palindrome (173154787451371).

The spelling of 131020443431240 in words is "one hundred thirty-one trillion, twenty billion, four hundred forty-three million, four hundred thirty-one thousand, two hundred forty".