131310220 has 24 divisors (see below), whose sum is σ = 287741664. Its totient is φ = 50240256.

The previous prime is 131310217. The next prime is 131310239. The reversal of 131310220 is 22013131.

It is a self number, because there is not a number n which added to its sum of digits gives 131310220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142269 + ... + 143188.

It is an arithmetic number, because the mean of its divisors is an integer number (11989236).

Almost surely, 2^131310220 is an apocalyptic number.

131310220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131310220 is an abundant number, since it is smaller than the sum of its proper divisors (156431444).

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

131310220 is a wasteful number, since it uses less digits than its factorization.

131310220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285489 (or 285487 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 131310220 is about 11459.0671522598. The cubic root of 131310220 is about 508.2758901915.

Adding to 131310220 its reverse (22013131), we get a palindrome (153323351).

The spelling of 131310220 in words is "one hundred thirty-one million, three hundred ten thousand, two hundred twenty".