131504540 has 12 divisors (see below), whose sum is σ = 276159576. Its totient is φ = 52601808.

The previous prime is 131504533. The next prime is 131504551. The reversal of 131504540 is 45405131.

It is a super-2 number, since 2×131504540² = 34586888081223200, which contains 22 as substring.

It is a congruent 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, 3287594 + ... + 3287633.

It is an arithmetic number, because the mean of its divisors is an integer number (23013298).

Almost surely, 2^131504540 is an apocalyptic number.

131504540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131504540 is an abundant number, since it is smaller than the sum of its proper divisors (144655036).

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

131504540 is a wasteful number, since it uses less digits than its factorization.

131504540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6575236 (or 6575234 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 131504540 is about 11467.5428928781. The cubic root of 131504540 is about 508.5264913764.

Adding to 131504540 its reverse (45405131), we get a palindrome (176909671).

The spelling of 131504540 in words is "one hundred thirty-one million, five hundred four thousand, five hundred forty".