143221132 has 12 divisors (see below), whose sum is σ = 256466056. Its totient is φ = 69945120.

The previous prime is 143221123. The next prime is 143221153. The reversal of 143221132 is 231122341.

It is a happy number.

It is a super-2 number, since 2×143221132² = 41024585302722848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416169 + ... + 416512.

Almost surely, 2^143221132 is an apocalyptic number.

It is an amenable number.

143221132 is a deficient number, since it is larger than the sum of its proper divisors (113244924).

143221132 is a wasteful number, since it uses less digits than its factorization.

143221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832728 (or 832726 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 143221132 is about 11967.5031648210. The cubic root of 143221132 is about 523.2015645459.

Adding to 143221132 its reverse (231122341), we get a palindrome (374343473).

The spelling of 143221132 in words is "one hundred forty-three million, two hundred twenty-one thousand, one hundred thirty-two".