131330220 has 96 divisors (see below), whose sum is σ = 429262848. Its totient is φ = 29375232.

The previous prime is 131330201. The next prime is 131330273. The reversal of 131330220 is 22033131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131330220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16414 + ... + 23066.

It is an arithmetic number, because the mean of its divisors is an integer number (4471488).

Almost surely, 2^131330220 is an apocalyptic number.

131330220 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 131330220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214631424).

131330220 is an abundant number, since it is smaller than the sum of its proper divisors (297932628).

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

131330220 is a wasteful number, since it uses less digits than its factorization.

131330220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719 (or 6717 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 131330220 is about 11459.9397904177. The cubic root of 131330220 is about 508.3016942295.

Adding to 131330220 its reverse (22033131), we get a palindrome (153363351).

The spelling of 131330220 in words is "one hundred thirty-one million, three hundred thirty thousand, two hundred twenty".