143221252 has 12 divisors (see below), whose sum is σ = 252551376. Its totient is φ = 71063720.

The previous prime is 143221237. The next prime is 143221279. The reversal of 143221252 is 252122341.

It is a happy number.

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, 136138 + ... + 137185.

It is an arithmetic number, because the mean of its divisors is an integer number (21045948).

Almost surely, 2^143221252 is an apocalyptic number.

It is an amenable number.

143221252 is a deficient number, since it is larger than the sum of its proper divisors (109330124).

143221252 is a wasteful number, since it uses less digits than its factorization.

143221252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273458 (or 273456 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 143221252 is about 11967.5081783970. The cubic root of 143221252 is about 523.2017106700.

Adding to 143221252 its reverse (252122341), we get a palindrome (395343593).

The spelling of 143221252 in words is "one hundred forty-three million, two hundred twenty-one thousand, two hundred fifty-two".