143331221 has 8 divisors (see below), whose sum is σ = 157910688. Its totient is φ = 129010000.

The previous prime is 143331191. The next prime is 143331271. The reversal of 143331221 is 122133341.

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 143331221 - 2¹⁰ = 143330197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143331193 and 143331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143331271) 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 7 ways as a sum of consecutive naturals, for example, 63395 + ... + 65616.

It is an arithmetic number, because the mean of its divisors is an integer number (19738836).

Almost surely, 2^143331221 is an apocalyptic number.

143331221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143331221 is a deficient number, since it is larger than the sum of its proper divisors (14579467).

143331221 is a wasteful number, since it uses less digits than its factorization.

143331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129123.

The product of its digits is 432, while the sum is 20.

The square root of 143331221 is about 11972.1017787187. The cubic root of 143331221 is about 523.3355857026.

Adding to 143331221 its reverse (122133341), we get a palindrome (265464562).

The spelling of 143331221 in words is "one hundred forty-three million, three hundred thirty-one thousand, two hundred twenty-one".