131411540 has 24 divisors (see below), whose sum is σ = 297192840. Its totient is φ = 48521088.

The previous prime is 131411509. The next prime is 131411549. The reversal of 131411540 is 45114131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13645636 + 117765904 = 3694^2 + 10852^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131411549) 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, 252455 + ... + 252974.

It is an arithmetic number, because the mean of its divisors is an integer number (12383035).

Almost surely, 2^131411540 is an apocalyptic number.

131411540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131411540 is an abundant number, since it is smaller than the sum of its proper divisors (165781300).

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

131411540 is a wasteful number, since it uses less digits than its factorization.

131411540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505451 (or 505449 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 131411540 is about 11463.4872530134. The cubic root of 131411540 is about 508.4065864752.

Adding to 131411540 its reverse (45114131), we get a palindrome (176525671).

The spelling of 131411540 in words is "one hundred thirty-one million, four hundred eleven thousand, five hundred forty".