181012222 has 8 divisors (see below), whose sum is σ = 272736576. Its totient is φ = 90100032.

The previous prime is 181012219. The next prime is 181012283. The reversal of 181012222 is 222210181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 181012222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202483 + ... + 203374.

It is an arithmetic number, because the mean of its divisors is an integer number (34092072).

Almost surely, 2^181012222 is an apocalyptic number.

181012222 is a deficient number, since it is larger than the sum of its proper divisors (91724354).

181012222 is a wasteful number, since it uses less digits than its factorization.

181012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406082.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 181012222 is about 13454.0782664588. The cubic root of 181012222 is about 565.6780144524.

The spelling of 181012222 in words is "one hundred eighty-one million, twelve thousand, two hundred twenty-two".