184223021 has 2 divisors, whose sum is σ = 184223022. Its totient is φ = 184223020.

The previous prime is 184222991. The next prime is 184223059. The reversal of 184223021 is 120322481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179854921 + 4368100 = 13411^2 + 2090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-184223021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (184223521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92111510 + 92111511.

It is an arithmetic number, because the mean of its divisors is an integer number (92111511).

Almost surely, 2^184223021 is an apocalyptic number.

It is an amenable number.

184223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

184223021 is an equidigital number, since it uses as much as digits as its factorization.

184223021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 184223021 is about 13572.8781398788. The cubic root of 184223021 is about 569.0031010360.

The spelling of 184223021 in words is "one hundred eighty-four million, two hundred twenty-three thousand, twenty-one".