131304220 has 24 divisors (see below), whose sum is σ = 284635008. Its totient is φ = 50827200.

The previous prime is 131304191. The next prime is 131304221. The reversal of 131304220 is 22403131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131304194 and 131304203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131304221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105271 + ... + 106510.

It is an arithmetic number, because the mean of its divisors is an integer number (11859792).

Almost surely, 2^131304220 is an apocalyptic number.

131304220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131304220 is an abundant number, since it is smaller than the sum of its proper divisors (153330788).

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

131304220 is a wasteful number, since it uses less digits than its factorization.

131304220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211821 (or 211819 counting only the distinct ones).

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

The square root of 131304220 is about 11458.8053478537. The cubic root of 131304220 is about 508.2681484692.

Adding to 131304220 its reverse (22403131), we get a palindrome (153707351).

The spelling of 131304220 in words is "one hundred thirty-one million, three hundred four thousand, two hundred twenty".