132128181 has 6 divisors (see below), whose sum is σ = 190851830. Its totient is φ = 88085448.

The previous prime is 132128179. The next prime is 132128189. The reversal of 132128181 is 181821231.

It can be written as a sum of positive squares in only one way, i.e., 96236100 + 35892081 = 9810^2 + 5991^2 .

It is not a de Polignac number, because 132128181 - 2¹ = 132128179 is a prime.

It is a super-2 number, since 2×132128181² = 34915712428737522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132128189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7340446 + ... + 7340463.

Almost surely, 2^132128181 is an apocalyptic number.

It is an amenable number.

132128181 is a deficient number, since it is larger than the sum of its proper divisors (58723649).

132128181 is a wasteful number, since it uses less digits than its factorization.

132128181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14680915 (or 14680912 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 132128181 is about 11494.7023014952. The cubic root of 132128181 is about 509.3290947428.

The spelling of 132128181 in words is "one hundred thirty-two million, one hundred twenty-eight thousand, one hundred eighty-one".