131181860 has 48 divisors (see below), whose sum is σ = 292780656. Its totient is φ = 49201152.

The previous prime is 131181859. The next prime is 131181881. The reversal of 131181860 is 68181131.

It can be written as a sum of positive squares in 8 ways, for example, as 16434916 + 114746944 = 4054^2 + 10712^2 .

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, 119474 + ... + 120566.

It is an arithmetic number, because the mean of its divisors is an integer number (6099597).

Almost surely, 2^131181860 is an apocalyptic number.

131181860 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 131181860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146390328).

131181860 is an abundant number, since it is smaller than the sum of its proper divisors (161598796).

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

131181860 is a wasteful number, since it uses less digits than its factorization.

131181860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 131181860 is about 11453.4649779008. The cubic root of 131181860 is about 508.1102174722.

The spelling of 131181860 in words is "one hundred thirty-one million, one hundred eighty-one thousand, eight hundred sixty".