131340220 has 48 divisors (see below), whose sum is σ = 308248416. Its totient is φ = 46592000.

The previous prime is 131340169. The next prime is 131340247. The reversal of 131340220 is 22043131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131340194 and 131340203.

It is a congruent number.

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, 1740 + ... + 16300.

It is an arithmetic number, because the mean of its divisors is an integer number (6421842).

Almost surely, 2^131340220 is an apocalyptic number.

131340220 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 131340220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154124208).

131340220 is an abundant number, since it is smaller than the sum of its proper divisors (176908196).

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

131340220 is a wasteful number, since it uses less digits than its factorization.

131340220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14622 (or 14620 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 131340220 is about 11460.3760845794. The cubic root of 131340220 is about 508.3145952662.

Adding to 131340220 its reverse (22043131), we get a palindrome (153383351).

The spelling of 131340220 in words is "one hundred thirty-one million, three hundred forty thousand, two hundred twenty".