131440432540 has 48 divisors (see below), whose sum is σ = 277399922688. Its totient is φ = 52314502464.

The previous prime is 131440432537. The next prime is 131440432589. The reversal of 131440432540 is 45234044131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10800499 + ... + 10812661.

It is an arithmetic number, because the mean of its divisors is an integer number (5779165056).

Almost surely, 2^131440432540 is an apocalyptic number.

131440432540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131440432540 is an abundant number, since it is smaller than the sum of its proper divisors (145959490148).

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

131440432540 is a wasteful number, since it uses less digits than its factorization.

131440432540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14818 (or 14816 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 131440432540 its reverse (45234044131), we get a palindrome (176674476671).

The spelling of 131440432540 in words is "one hundred thirty-one billion, four hundred forty million, four hundred thirty-two thousand, five hundred forty".