143221402 has 8 divisors (see below), whose sum is σ = 215255700. Its totient is φ = 71469504.

The previous prime is 143221369. The next prime is 143221451. The reversal of 143221402 is 204122341.

It can be written as a sum of positive squares in 2 ways, for example, as 105288121 + 37933281 = 10261^2 + 6159^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 143221402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69327 + ... + 71362.

Almost surely, 2^143221402 is an apocalyptic number.

143221402 is a deficient number, since it is larger than the sum of its proper divisors (72034298).

143221402 is a wasteful number, since it uses less digits than its factorization.

143221402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141200.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 143221402 is about 11967.5144453642. The cubic root of 143221402 is about 523.2018933250.

Adding to 143221402 its reverse (204122341), we get a palindrome (347343743).

The spelling of 143221402 in words is "one hundred forty-three million, two hundred twenty-one thousand, four hundred two".