181042222 has 12 divisors (see below), whose sum is σ = 286609536. Its totient is φ = 85756500.

The previous prime is 181042219. The next prime is 181042229. The reversal of 181042222 is 222240181.

It is a super-2 number, since 2×181042222² = 65552572293394568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181042193 and 181042202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181042229) 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, 124654 + ... + 126097.

It is an arithmetic number, because the mean of its divisors is an integer number (23884128).

Almost surely, 2^181042222 is an apocalyptic number.

181042222 is a deficient number, since it is larger than the sum of its proper divisors (105567314).

181042222 is a wasteful number, since it uses less digits than its factorization.

181042222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250791 (or 250772 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 181042222 is about 13455.1931238463. The cubic root of 181042222 is about 565.7092635449.

The spelling of 181042222 in words is "one hundred eighty-one million, forty-two thousand, two hundred twenty-two".