181852228 has 6 divisors (see below), whose sum is σ = 318241406. Its totient is φ = 90926112.

The previous prime is 181852199. The next prime is 181852267. The reversal of 181852228 is 822258181.

It can be written as a sum of positive squares in only one way, i.e., 180579844 + 1272384 = 13438^2 + 1128^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22731525 + ... + 22731532.

Almost surely, 2^181852228 is an apocalyptic number.

It is an amenable number.

181852228 is a deficient number, since it is larger than the sum of its proper divisors (136389178).

181852228 is a wasteful number, since it uses less digits than its factorization.

181852228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45463061 (or 45463059 counting only the distinct ones).

The product of its digits is 20480, while the sum is 37.

The square root of 181852228 is about 13485.2596563804. The cubic root of 181852228 is about 566.5516935524.

The spelling of 181852228 in words is "one hundred eighty-one million, eight hundred fifty-two thousand, two hundred twenty-eight".