181822312201 has 16 divisors (see below), whose sum is σ = 193426646400. Its totient is φ = 170424511488.

The previous prime is 181822312127. The next prime is 181822312297. The reversal of 181822312201 is 102213228181.

It is a cyclic number.

It is not a de Polignac number, because 181822312201 - 2³⁷ = 44383358729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181822312501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2128425 + ... + 2212201.

It is an arithmetic number, because the mean of its divisors is an integer number (12089165400).

Almost surely, 2^181822312201 is an apocalyptic number.

It is an amenable number.

181822312201 is a deficient number, since it is larger than the sum of its proper divisors (11604334199).

181822312201 is a wasteful number, since it uses less digits than its factorization.

181822312201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85008.

The product of its (nonzero) digits is 3072, while the sum is 31.

The spelling of 181822312201 in words is "one hundred eighty-one billion, eight hundred twenty-two million, three hundred twelve thousand, two hundred one".