143130221 has 8 divisors (see below), whose sum is σ = 157900344. Its totient is φ = 128897280.

The previous prime is 143130209. The next prime is 143130227. The reversal of 143130221 is 122031341.

It can be written as a sum of positive squares in 4 ways, for example, as 15100996 + 128029225 = 3886^2 + 11315^2 .

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 143130221 - 2²⁶ = 76021357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143130221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143130227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133736 + ... + 134801.

It is an arithmetic number, because the mean of its divisors is an integer number (19737543).

Almost surely, 2^143130221 is an apocalyptic number.

It is an amenable number.

143130221 is a deficient number, since it is larger than the sum of its proper divisors (14770123).

143130221 is a wasteful number, since it uses less digits than its factorization.

143130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268591.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 143130221 is about 11963.7043176434. The cubic root of 143130221 is about 523.0908386952.

Adding to 143130221 its reverse (122031341), we get a palindrome (265161562).

The spelling of 143130221 in words is "one hundred forty-three million, one hundred thirty thousand, two hundred twenty-one".