131320220 has 24 divisors (see below), whose sum is σ = 280977984. Its totient is φ = 51536576.

The previous prime is 131320219. The next prime is 131320261. The reversal of 131320220 is 22023131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131320195 and 131320204.

It is a congruent number.

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, 60884 + ... + 63003.

It is an arithmetic number, because the mean of its divisors is an integer number (11707416).

Almost surely, 2^131320220 is an apocalyptic number.

131320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131320220 is an abundant number, since it is smaller than the sum of its proper divisors (149657764).

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

131320220 is a wasteful number, since it uses less digits than its factorization.

131320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123949 (or 123947 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 131320220 is about 11459.5034796452. The cubic root of 131320220 is about 508.2887925380.

Adding to 131320220 its reverse (22023131), we get a palindrome (153343351).

The spelling of 131320220 in words is "one hundred thirty-one million, three hundred twenty thousand, two hundred twenty".