143224321 has 8 divisors (see below), whose sum is σ = 146256264. Its totient is φ = 140221440.

The previous prime is 143224297. The next prime is 143224331. The reversal of 143224321 is 123422341.

It can be written as a sum of positive squares in 4 ways, for example, as 2446096 + 140778225 = 1564^2 + 11865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 143224321 - 2⁹ = 143223809 is a prime.

It is a super-2 number, since 2×143224321² = 41026412251822082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143224292 and 143224301.

It is not an unprimeable number, because it can be changed into a prime (143224331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2841 + ... + 17161.

It is an arithmetic number, because the mean of its divisors is an integer number (18282033).

Almost surely, 2^143224321 is an apocalyptic number.

It is an amenable number.

143224321 is a deficient number, since it is larger than the sum of its proper divisors (3031943).

143224321 is a wasteful number, since it uses less digits than its factorization.

143224321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14531.

The product of its digits is 1152, while the sum is 22.

The square root of 143224321 is about 11967.6363998912. The cubic root of 143224321 is about 523.2054477657.

Adding to 143224321 its reverse (123422341), we get a palindrome (266646662).

The spelling of 143224321 in words is "one hundred forty-three million, two hundred twenty-four thousand, three hundred twenty-one".