143221143 has 32 divisors (see below), whose sum is σ = 212486400. Its totient is φ = 85257216.

The previous prime is 143221123. The next prime is 143221153. The reversal of 143221143 is 341122341.

It is not a de Polignac number, because 143221143 - 2⁸ = 143220887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143221123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153703 + ... + 154631.

It is an arithmetic number, because the mean of its divisors is an integer number (6640200).

Almost surely, 2^143221143 is an apocalyptic number.

143221143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

143221143 is a deficient number, since it is larger than the sum of its proper divisors (69265257).

143221143 is a wasteful number, since it uses less digits than its factorization.

143221143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its digits is 576, while the sum is 21.

The square root of 143221143 is about 11967.5036243989. The cubic root of 143221143 is about 523.2015779407.

Adding to 143221143 its reverse (341122341), we get a palindrome (484343484).

The spelling of 143221143 in words is "one hundred forty-three million, two hundred twenty-one thousand, one hundred forty-three".