131542540 has 12 divisors (see below), whose sum is σ = 276239376. Its totient is φ = 52617008.

The previous prime is 131542513. The next prime is 131542597. The reversal of 131542540 is 45245131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3288544 + ... + 3288583.

It is an arithmetic number, because the mean of its divisors is an integer number (23019948).

Almost surely, 2^131542540 is an apocalyptic number.

131542540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131542540 is an abundant number, since it is smaller than the sum of its proper divisors (144696836).

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

131542540 is a wasteful number, since it uses less digits than its factorization.

131542540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6577136 (or 6577134 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 131542540 is about 11469.1996233390. The cubic root of 131542540 is about 508.5754685084.

Adding to 131542540 its reverse (45245131), we get a palindrome (176787671).

The spelling of 131542540 in words is "one hundred thirty-one million, five hundred forty-two thousand, five hundred forty".