183321841921 has 3 divisors (see below), whose sum is σ = 183322270083. Its totient is φ = 183321413760.

The previous prime is 183321841919. The next prime is 183321841933. The reversal of 183321841921 is 129148123381.

The square root of 183321841921 is 428161.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 36142192321 + 147179649600 = 190111^2 + 383640^2 .

It is not a de Polignac number, because 183321841921 - 2¹ = 183321841919 is a prime.

It is a super-2 number, since 2×183321841921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (183321841961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 214081 + ... + 642241.

It is an arithmetic number, because the mean of its divisors is an integer number (61107423361).

Almost surely, 2^183321841921 is an apocalyptic number.

183321841921 is the 428161-st square number.

183321841921 is the 214081-st centered octagonal number.

It is an amenable number.

183321841921 is a deficient number, since it is larger than the sum of its proper divisors (428162).

183321841921 is an frugal number, since it uses more digits than its factorization.

183321841921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856322 (or 428161 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The spelling of 183321841921 in words is "one hundred eighty-three billion, three hundred twenty-one million, eight hundred forty-one thousand, nine hundred twenty-one".