131061540 has 24 divisors (see below), whose sum is σ = 366972480. Its totient is φ = 34949728.

The previous prime is 131061523. The next prime is 131061569. The reversal of 131061540 is 45160131.

It is an unprimeable number.

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, 1092120 + ... + 1092239.

It is an arithmetic number, because the mean of its divisors is an integer number (15290520).

Almost surely, 2^131061540 is an apocalyptic number.

131061540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131061540 is an abundant number, since it is smaller than the sum of its proper divisors (235910940).

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

131061540 is a wasteful number, since it uses less digits than its factorization.

131061540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184371 (or 2184369 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 131061540 is about 11448.2112139845. The cubic root of 131061540 is about 507.9548237256.

The spelling of 131061540 in words is "one hundred thirty-one million, sixty-one thousand, five hundred forty".