143421224 has 16 divisors (see below), whose sum is σ = 269510100. Its totient is φ = 71551872.

The previous prime is 143421209. The next prime is 143421247. The reversal of 143421224 is 422124341.

It can be written as a sum of positive squares in 2 ways, for example, as 101404900 + 42016324 = 10070^2 + 6482^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 143421224.

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, 15959 + ... + 23270.

Almost surely, 2^143421224 is an apocalyptic number.

It is an amenable number.

143421224 is a deficient number, since it is larger than the sum of its proper divisors (126088876).

143421224 is a wasteful number, since it uses less digits than its factorization.

143421224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39692 (or 39688 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 143421224 is about 11975.8600526225. The cubic root of 143421224 is about 523.4451034030.

Adding to 143421224 its reverse (422124341), we get a palindrome (565545565).

The spelling of 143421224 in words is "one hundred forty-three million, four hundred twenty-one thousand, two hundred twenty-four".