131115540 has 48 divisors (see below), whose sum is σ = 376084800. Its totient is φ = 34110720.

The previous prime is 131115539. The next prime is 131115563. The reversal of 131115540 is 45511131.

It is a happy number.

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, 24190 + ... + 29109.

It is an arithmetic number, because the mean of its divisors is an integer number (7835100).

Almost surely, 2^131115540 is an apocalyptic number.

131115540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131115540 is an abundant number, since it is smaller than the sum of its proper divisors (244969260).

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

131115540 is a wasteful number, since it uses less digits than its factorization.

131115540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53352 (or 53350 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 131115540 is about 11450.5694181556. The cubic root of 131115540 is about 508.0245766935.

Adding to 131115540 its reverse (45511131), we get a palindrome (176626671).

The spelling of 131115540 in words is "one hundred thirty-one million, one hundred fifteen thousand, five hundred forty".