143424221 has 8 divisors (see below), whose sum is σ = 149249760. Its totient is φ = 137711952.

The previous prime is 143424187. The next prime is 143424241. The reversal of 143424221 is 122424341.

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 143424221 - 2¹⁴ = 143407837 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 (143424241) 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, 25730 + ... + 30803.

It is an arithmetic number, because the mean of its divisors is an integer number (18656220).

Almost surely, 2^143424221 is an apocalyptic number.

It is an amenable number.

143424221 is a deficient number, since it is larger than the sum of its proper divisors (5825539).

143424221 is an equidigital number, since it uses as much as digits as its factorization.

143424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56635.

The product of its digits is 1536, while the sum is 23.

The square root of 143424221 is about 11975.9851786815. The cubic root of 143424221 is about 523.4487494325.

Adding to 143424221 its reverse (122424341), we get a palindrome (265848562).

The spelling of 143424221 in words is "one hundred forty-three million, four hundred twenty-four thousand, two hundred twenty-one".