180699222 has 56 divisors (see below), whose sum is σ = 420922872. Its totient is φ = 51536320.

The previous prime is 180699221. The next prime is 180699227. The reversal of 180699222 is 222996081.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180699221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 10629358 + ... + 10629374.

Almost surely, 2^180699222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180699222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210461436).

180699222 is an abundant number, since it is smaller than the sum of its proper divisors (240223650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180699222 is an frugal number, since it uses more digits than its factorization.

180699222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 180699222 is about 13442.4410729599. The cubic root of 180699222 is about 565.3517761310.

The spelling of 180699222 in words is "one hundred eighty million, six hundred ninety-nine thousand, two hundred twenty-two".