143223449 has 4 divisors (see below), whose sum is σ = 144023760. Its totient is φ = 142423140.

The previous prime is 143223403. The next prime is 143223467. The reversal of 143223449 is 944322341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-143223449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143223049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399887 + ... + 400244.

It is an arithmetic number, because the mean of its divisors is an integer number (36005940).

Almost surely, 2^143223449 is an apocalyptic number.

It is an amenable number.

143223449 is a deficient number, since it is larger than the sum of its proper divisors (800311).

143223449 is an equidigital number, since it uses as much as digits as its factorization.

143223449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800310.

The product of its digits is 20736, while the sum is 32.

The square root of 143223449 is about 11967.5999682476. The cubic root of 143223449 is about 523.2043859440.

It can be divided in two parts, 14322 and 3449, that added together give a palindrome (17771).

The spelling of 143223449 in words is "one hundred forty-three million, two hundred twenty-three thousand, four hundred forty-nine".