181302203221133 has 8 divisors (see below), whose sum is σ = 185724929138616. Its totient is φ = 176879511635200.

The previous prime is 181302203221091. The next prime is 181302203221157. The reversal of 181302203221133 is 331122302203181.

It can be written as a sum of positive squares in 4 ways, for example, as 19402994243689 + 161899208977444 = 4404883^2 + 12723962^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181302203221133 - 2²⁰ = 181302202172557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 181302203221133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181302203220133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2273243 + ... + 19177383.

It is an arithmetic number, because the mean of its divisors is an integer number (23215616142327).

Almost surely, 2^{181302203221133} is an apocalyptic number.

It is an amenable number.

181302203221133 is a deficient number, since it is larger than the sum of its proper divisors (4422725917483).

181302203221133 is a wasteful number, since it uses less digits than its factorization.

181302203221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17165775.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 181302203221133 in words is "one hundred eighty-one trillion, three hundred two billion, two hundred three million, two hundred twenty-one thousand, one hundred thirty-three".