131005540 has 24 divisors (see below), whose sum is σ = 278429760. Its totient is φ = 51770208.

The previous prime is 131005529. The next prime is 131005541. The reversal of 131005540 is 45500131.

It is not an unprimeable number, because it can be changed into a prime (131005541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37800 + ... + 41119.

It is an arithmetic number, because the mean of its divisors is an integer number (11601240).

Almost surely, 2^131005540 is an apocalyptic number.

131005540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131005540 is an abundant number, since it is smaller than the sum of its proper divisors (147424220).

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

131005540 is a wasteful number, since it uses less digits than its factorization.

131005540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79011 (or 79009 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 131005540 is about 11445.7651557246. The cubic root of 131005540 is about 507.8824670742.

Adding to 131005540 its reverse (45500131), we get a palindrome (176505671).

The spelling of 131005540 in words is "one hundred thirty-one million, five thousand, five hundred forty".