143213225 has 24 divisors (see below), whose sum is σ = 182097720. Its totient is φ = 111697920.

The previous prime is 143213209. The next prime is 143213227. The reversal of 143213225 is 522312341.

It can be written as a sum of positive squares in 12 ways, for example, as 13344409 + 129868816 = 3653^2 + 11396^2 .

It is not a de Polignac number, because 143213225 - 2⁴ = 143213209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143213225.

It is not an unprimeable number, because it can be changed into a prime (143213227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176621 + ... + 177429.

It is an arithmetic number, because the mean of its divisors is an integer number (7587405).

Almost surely, 2^143213225 is an apocalyptic number.

It is an amenable number.

143213225 is a deficient number, since it is larger than the sum of its proper divisors (38884495).

143213225 is an equidigital number, since it uses as much as digits as its factorization.

143213225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 984 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 143213225 is about 11967.1728073092. The cubic root of 143213225 is about 523.1919360066.

Adding to 143213225 its reverse (522312341), we get a palindrome (665525566).

The spelling of 143213225 in words is "one hundred forty-three million, two hundred thirteen thousand, two hundred twenty-five".