180745222 has 32 divisors (see below), whose sum is σ = 324763200. Its totient is φ = 75358080.

The previous prime is 180745183. The next prime is 180745223. The reversal of 180745222 is 222547081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180745223) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 21822 + ... + 28942.

It is an arithmetic number, because the mean of its divisors is an integer number (10148850).

Almost surely, 2^180745222 is an apocalyptic number.

180745222 is a deficient number, since it is larger than the sum of its proper divisors (144017978).

180745222 is an equidigital number, since it uses as much as digits as its factorization.

180745222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7181 (or 7167 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 180745222 is about 13444.1519628424. The cubic root of 180745222 is about 565.3997453013.

The spelling of 180745222 in words is "one hundred eighty million, seven hundred forty-five thousand, two hundred twenty-two".