131541540 has 48 divisors (see below), whose sum is σ = 396650688. Its totient is φ = 32379264.

The previous prime is 131541499. The next prime is 131541589. The reversal of 131541540 is 45145131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 131541540.

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, 83542 + ... + 85101.

It is an arithmetic number, because the mean of its divisors is an integer number (8263556).

Almost surely, 2^131541540 is an apocalyptic number.

131541540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131541540 is an abundant number, since it is smaller than the sum of its proper divisors (265109148).

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

131541540 is a wasteful number, since it uses less digits than its factorization.

131541540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168668 (or 168666 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 131541540 is about 11469.1560282350. The cubic root of 131541540 is about 508.5741797574.

Adding to 131541540 its reverse (45145131), we get a palindrome (176686671).

The spelling of 131541540 in words is "one hundred thirty-one million, five hundred forty-one thousand, five hundred forty".