131560240 has 80 divisors (see below), whose sum is σ = 361673280. Its totient is φ = 43545600.

The previous prime is 131560193. The next prime is 131560241. The reversal of 131560240 is 42065131.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (131560241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12190 + ... + 20290.

It is an arithmetic number, because the mean of its divisors is an integer number (4520916).

Almost surely, 2^131560240 is an apocalyptic number.

131560240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131560240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180836640).

131560240 is an abundant number, since it is smaller than the sum of its proper divisors (230113040).

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

131560240 is a wasteful number, since it uses less digits than its factorization.

131560240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8150 (or 8144 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131560240 is about 11469.9712292577. The cubic root of 131560240 is about 508.5982783211.

The spelling of 131560240 in words is "one hundred thirty-one million, five hundred sixty thousand, two hundred forty".