143303221 has 2 divisors, whose sum is σ = 143303222. Its totient is φ = 143303220.

The previous prime is 143303207. The next prime is 143303227. The reversal of 143303221 is 122303341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92736900 + 50566321 = 9630^2 + 7111^2 .

It is a cyclic number.

It is not a de Polignac number, because 143303221 - 2¹³ = 143295029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143303227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71651610 + 71651611.

It is an arithmetic number, because the mean of its divisors is an integer number (71651611).

Almost surely, 2^143303221 is an apocalyptic number.

It is an amenable number.

143303221 is a deficient number, since it is larger than the sum of its proper divisors (1).

143303221 is an equidigital number, since it uses as much as digits as its factorization.

143303221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 143303221 is about 11970.9323362886. The cubic root of 143303221 is about 523.3015053150.

Adding to 143303221 its reverse (122303341), we get a palindrome (265606562).

The spelling of 143303221 in words is "one hundred forty-three million, three hundred three thousand, two hundred twenty-one".