184001221 has 2 divisors, whose sum is σ = 184001222. Its totient is φ = 184001220.

The previous prime is 184001197. The next prime is 184001239. The reversal of 184001221 is 122100481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127916100 + 56085121 = 11310^2 + 7489^2 .

It is a cyclic number.

It is not a de Polignac number, because 184001221 - 2⁵ = 184001189 is a prime.

184001221 is a modest number, since divided by 1221 gives 184 as remainder.

It is equal to p_10240318 and since 184001221 and 10240318 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (184001281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92000610 + 92000611.

It is an arithmetic number, because the mean of its divisors is an integer number (92000611).

Almost surely, 2^184001221 is an apocalyptic number.

It is an amenable number.

184001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

184001221 is an equidigital number, since it uses as much as digits as its factorization.

184001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 184001221 is about 13564.7049728330. The cubic root of 184001221 is about 568.7746540696.

The spelling of 184001221 in words is "one hundred eighty-four million, one thousand, two hundred twenty-one".