131200240 has 40 divisors (see below), whose sum is σ = 308484720. Its totient is φ = 51887616.

The previous prime is 131200229. The next prime is 131200241. The reversal of 131200240 is 42002131.

131200240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 131200240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131200241) 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, 2094 + ... + 16333.

It is an arithmetic number, because the mean of its divisors is an integer number (7712118).

Almost surely, 2^131200240 is an apocalyptic number.

131200240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131200240 is an abundant number, since it is smaller than the sum of its proper divisors (177284480).

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

131200240 is a wasteful number, since it uses less digits than its factorization.

131200240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18529 (or 18523 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 131200240 is about 11454.2673270707. The cubic root of 131200240 is about 508.1339469464.

Adding to 131200240 its reverse (42002131), we get a palindrome (173202371).

The spelling of 131200240 in words is "one hundred thirty-one million, two hundred thousand, two hundred forty".