234144221 has 2 divisors, whose sum is σ = 234144222. Its totient is φ = 234144220.

The previous prime is 234144217. The next prime is 234144223. The reversal of 234144221 is 122441432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146047225 + 88096996 = 12085^2 + 9386^2 .

It is a cyclic number.

It is not a de Polignac number, because 234144221 - 2² = 234144217 is a prime.

Together with 234144223, 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 (234144223) 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 as a sum of consecutive naturals, namely, 117072110 + 117072111.

It is an arithmetic number, because the mean of its divisors is an integer number (117072111).

Almost surely, 2^234144221 is an apocalyptic number.

It is an amenable number.

234144221 is a deficient number, since it is larger than the sum of its proper divisors (1).

234144221 is an equidigital number, since it uses as much as digits as its factorization.

234144221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 23.

The square root of 234144221 is about 15301.7718255109. The cubic root of 234144221 is about 616.3505876975.

Adding to 234144221 its reverse (122441432), we get a palindrome (356585653).

The spelling of 234144221 in words is "two hundred thirty-four million, one hundred forty-four thousand, two hundred twenty-one".