131201431432340 has 24 divisors (see below), whose sum is σ = 275523540957000. Its totient is φ = 52480470677888.

The previous prime is 131201431432321. The next prime is 131201431432349. The reversal of 131201431432340 is 43234134102131.

It can be written as a sum of positive squares in 4 ways, for example, as 11808308887684 + 119393122544656 = 3436322^2 + 10926716^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131201431432297 and 131201431432306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201431432349) 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, 4655414 + ... + 16854546.

It is an arithmetic number, because the mean of its divisors is an integer number (11480147539875).

Almost surely, 2^{131201431432340} is an apocalyptic number.

131201431432340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131201431432340 is an abundant number, since it is smaller than the sum of its proper divisors (144322109524660).

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

131201431432340 is a wasteful number, since it uses less digits than its factorization.

131201431432340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12736891 (or 12736889 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 131201431432340 its reverse (43234134102131), we get a palindrome (174435565534471).

The spelling of 131201431432340 in words is "one hundred thirty-one trillion, two hundred one billion, four hundred thirty-one million, four hundred thirty-two thousand, three hundred forty".