131912220 has 96 divisors (see below), whose sum is σ = 404974080. Its totient is φ = 31816960.

The previous prime is 131912191. The next prime is 131912237. The reversal of 131912220 is 22219131.

It is a congruent number.

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, 177169 + ... + 177911.

It is an arithmetic number, because the mean of its divisors is an integer number (4218480).

Almost surely, 2^131912220 is an apocalyptic number.

131912220 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 131912220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202487040).

131912220 is an abundant number, since it is smaller than the sum of its proper divisors (273061860).

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

131912220 is a wasteful number, since it uses less digits than its factorization.

131912220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035 (or 1033 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 131912220 is about 11485.3045236075. The cubic root of 131912220 is about 509.0514471770.

The spelling of 131912220 in words is "one hundred thirty-one million, nine hundred twelve thousand, two hundred twenty".