181132445 has 16 divisors (see below), whose sum is σ = 234801840. Its totient is φ = 133346304.

The previous prime is 181132421. The next prime is 181132447. The reversal of 181132445 is 544231181.

It can be written as a sum of positive squares in 8 ways, for example, as 3363556 + 177768889 = 1834^2 + 13333^2 .

It is not a de Polignac number, because 181132445 - 2¹⁰ = 181131421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181132447) 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, 17771 + ... + 26039.

It is an arithmetic number, because the mean of its divisors is an integer number (14675115).

Almost surely, 2^181132445 is an apocalyptic number.

It is an amenable number.

181132445 is a deficient number, since it is larger than the sum of its proper divisors (53669395).

181132445 is a wasteful number, since it uses less digits than its factorization.

181132445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8624.

The product of its digits is 3840, while the sum is 29.

The square root of 181132445 is about 13458.5454266054. The cubic root of 181132445 is about 565.8032223095.

The spelling of 181132445 in words is "one hundred eighty-one million, one hundred thirty-two thousand, four hundred forty-five".