143223161 has 4 divisors (see below), whose sum is σ = 144832500. Its totient is φ = 141613824.

The previous prime is 143223133. The next prime is 143223163. The reversal of 143223161 is 161322341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47183161 + 96040000 = 6869^2 + 9800^2 .

It is a cyclic number.

It is not a de Polignac number, because 143223161 - 2⁶ = 143223097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143223163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 804536 + ... + 804713.

It is an arithmetic number, because the mean of its divisors is an integer number (36208125).

Almost surely, 2^143223161 is an apocalyptic number.

It is an amenable number.

143223161 is a deficient number, since it is larger than the sum of its proper divisors (1609339).

143223161 is an equidigital number, since it uses as much as digits as its factorization.

143223161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609338.

The product of its digits is 864, while the sum is 23.

The square root of 143223161 is about 11967.5879357538. The cubic root of 143223161 is about 523.2040352497.

The spelling of 143223161 in words is "one hundred forty-three million, two hundred twenty-three thousand, one hundred sixty-one".