131081730 has 96 divisors (see below), whose sum is σ = 360206784. Its totient is φ = 30342144.

The previous prime is 131081729. The next prime is 131081749. The reversal of 131081730 is 37180131.

It is a self number, because there is not a number n which added to its sum of digits gives 131081730.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112129 + ... + 113291.

It is an arithmetic number, because the mean of its divisors is an integer number (3752154).

Almost surely, 2^131081730 is an apocalyptic number.

131081730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 131081730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180103392).

131081730 is an abundant number, since it is smaller than the sum of its proper divisors (229125054).

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

131081730 is a wasteful number, since it uses less digits than its factorization.

131081730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 131081730 is about 11449.0929771751. The cubic root of 131081730 is about 507.9809058275.

The spelling of 131081730 in words is "one hundred thirty-one million, eighty-one thousand, seven hundred thirty".