143214221 has 2 divisors, whose sum is σ = 143214222. Its totient is φ = 143214220.

The previous prime is 143214173. The next prime is 143214241. The reversal of 143214221 is 122412341.

It is an a-pointer prime, because the next prime (143214241) can be obtained adding 143214221 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99720196 + 43494025 = 9986^2 + 6595^2 .

It is a cyclic number.

It is not a de Polignac number, because 143214221 - 2⁶ = 143214157 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 143214193 and 143214202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143214241) 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, 71607110 + 71607111.

It is an arithmetic number, because the mean of its divisors is an integer number (71607111).

Almost surely, 2^143214221 is an apocalyptic number.

It is an amenable number.

143214221 is a deficient number, since it is larger than the sum of its proper divisors (1).

143214221 is an equidigital number, since it uses as much as digits as its factorization.

143214221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 143214221 is about 11967.2144210756. The cubic root of 143214221 is about 523.1931488787.

Adding to 143214221 its reverse (122412341), we get a palindrome (265626562).

It can be divided in two parts, 143 and 214221, that multiplied together give a palindrome (30633603).

The spelling of 143214221 in words is "one hundred forty-three million, two hundred fourteen thousand, two hundred twenty-one".