143244221 has 2 divisors, whose sum is σ = 143244222. Its totient is φ = 143244220.

The previous prime is 143244169. The next prime is 143244229. The reversal of 143244221 is 122442341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126112900 + 17131321 = 11230^2 + 4139^2 .

It is a cyclic number.

It is not a de Polignac number, because 143244221 - 2¹⁴ = 143227837 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143244229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71622110 + 71622111.

It is an arithmetic number, because the mean of its divisors is an integer number (71622111).

Almost surely, 2^143244221 is an apocalyptic number.

It is an amenable number.

143244221 is a deficient number, since it is larger than the sum of its proper divisors (1).

143244221 is an equidigital number, since it uses as much as digits as its factorization.

143244221 is an evil number, because the sum of its binary digits is even.

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

The square root of 143244221 is about 11968.4677799625. The cubic root of 143244221 is about 523.2296785346.

Adding to 143244221 its reverse (122442341), we get a palindrome (265686562).

The spelling of 143244221 in words is "one hundred forty-three million, two hundred forty-four thousand, two hundred twenty-one".