181522722 has 16 divisors (see below), whose sum is σ = 363231072. Its totient is φ = 60476640.

The previous prime is 181522711. The next prime is 181522723. The reversal of 181522722 is 227225181.

181522722 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×181522722³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 181522722.

It is not an unprimeable number, because it can be changed into a prime (181522723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7197 + ... + 20367.

It is an arithmetic number, because the mean of its divisors is an integer number (22701942).

Almost surely, 2^181522722 is an apocalyptic number.

181522722 is an abundant number, since it is smaller than the sum of its proper divisors (181708350).

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

181522722 is a wasteful number, since it uses less digits than its factorization.

181522722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15473.

The product of its digits is 4480, while the sum is 30.

The square root of 181522722 is about 13473.0368514303. The cubic root of 181522722 is about 566.2093000780.

The spelling of 181522722 in words is "one hundred eighty-one million, five hundred twenty-two thousand, seven hundred twenty-two".