320143229 has 4 divisors (see below), whose sum is σ = 365877984. Its totient is φ = 274408476.

The previous prime is 320143223. The next prime is 320143249. The reversal of 320143229 is 922341023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 922341023 = 173 ⋅5331451.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320143229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320143198 and 320143207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320143223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22867367 + ... + 22867380.

It is an arithmetic number, because the mean of its divisors is an integer number (91469496).

Almost surely, 2^320143229 is an apocalyptic number.

It is an amenable number.

320143229 is a deficient number, since it is larger than the sum of its proper divisors (45734755).

320143229 is an equidigital number, since it uses as much as digits as its factorization.

320143229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45734754.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 320143229 is about 17892.5467443849. The cubic root of 320143229 is about 684.0924126761.

The spelling of 320143229 in words is "three hundred twenty million, one hundred forty-three thousand, two hundred twenty-nine".