131722180 has 48 divisors (see below), whose sum is σ = 284200560. Its totient is φ = 51264000.

The previous prime is 131722177. The next prime is 131722181. The reversal of 131722180 is 81227131.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1214404 + 130507776 = 1102^2 + 11424^2 .

It is not an unprimeable number, because it can be changed into a prime (131722181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122686 + ... + 123754.

It is an arithmetic number, because the mean of its divisors is an integer number (5920845).

Almost surely, 2^131722180 is an apocalyptic number.

131722180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131722180 is an abundant number, since it is smaller than the sum of its proper divisors (152478380).

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

131722180 is a wasteful number, since it uses less digits than its factorization.

131722180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 131722180 is about 11477.0283610349. The cubic root of 131722180 is about 508.8068738523.

The spelling of 131722180 in words is "one hundred thirty-one million, seven hundred twenty-two thousand, one hundred eighty".