184884221 has 2 divisors, whose sum is σ = 184884222. Its totient is φ = 184884220.

The previous prime is 184884209. The next prime is 184884223. The reversal of 184884221 is 122488481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155875225 + 29008996 = 12485^2 + 5386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-184884221 is a prime.

Together with 184884223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (184884223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92442110 + 92442111.

It is an arithmetic number, because the mean of its divisors is an integer number (92442111).

Almost surely, 2^184884221 is an apocalyptic number.

It is an amenable number.

184884221 is a deficient number, since it is larger than the sum of its proper divisors (1).

184884221 is an equidigital number, since it uses as much as digits as its factorization.

184884221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32768, while the sum is 38.

The square root of 184884221 is about 13597.2137219358. The cubic root of 184884221 is about 569.6830298841.

The spelling of 184884221 in words is "one hundred eighty-four million, eight hundred eighty-four thousand, two hundred twenty-one".