181202222 has 4 divisors (see below), whose sum is σ = 271803336. Its totient is φ = 90601110.

The previous prime is 181202173. The next prime is 181202227. The reversal of 181202222 is 222202181.

It is a happy number.

181202222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 181202194 and 181202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181202227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45300554 + ... + 45300557.

It is an arithmetic number, because the mean of its divisors is an integer number (67950834).

Almost surely, 2^181202222 is an apocalyptic number.

181202222 is a deficient number, since it is larger than the sum of its proper divisors (90601114).

181202222 is an equidigital number, since it uses as much as digits as its factorization.

181202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90601113.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 181202222 is about 13461.1374705112. The cubic root of 181202222 is about 565.8758670952.

The spelling of 181202222 in words is "one hundred eighty-one million, two hundred two thousand, two hundred twenty-two".