143222221 has 4 divisors (see below), whose sum is σ = 144612832. Its totient is φ = 141831612.

The previous prime is 143222197. The next prime is 143222237. The reversal of 143222221 is 122222341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122222341 = 797 ⋅153353.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143222221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143222251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695151 + ... + 695356.

It is an arithmetic number, because the mean of its divisors is an integer number (36153208).

Almost surely, 2^143222221 is an apocalyptic number.

It is an amenable number.

143222221 is a deficient number, since it is larger than the sum of its proper divisors (1390611).

143222221 is a wasteful number, since it uses less digits than its factorization.

143222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390610.

The product of its digits is 384, while the sum is 19.

The square root of 143222221 is about 11967.5486629468. The cubic root of 143222221 is about 523.2028906190.

Adding to 143222221 its reverse (122222341), we get a palindrome (265444562).

It can be divided in two parts, 1432 and 22221, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 143222221 in words is "one hundred forty-three million, two hundred twenty-two thousand, two hundred twenty-one".