320403243 has 8 divisors (see below), whose sum is σ = 427392000. Its totient is φ = 213508328.

The previous prime is 320403229. The next prime is 320403247. The reversal of 320403243 is 342304023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320403243 - 2²⁰ = 319354667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320403247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15063 + ... + 29456.

It is an arithmetic number, because the mean of its divisors is an integer number (53424000).

Almost surely, 2^320403243 is an apocalyptic number.

320403243 is a deficient number, since it is larger than the sum of its proper divisors (106988757).

320403243 is a wasteful number, since it uses less digits than its factorization.

320403243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46921.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 320403243 is about 17899.8112559881. The cubic root of 320403243 is about 684.2775646696.

Adding to 320403243 its reverse (342304023), we get a palindrome (662707266).

The spelling of 320403243 in words is "three hundred twenty million, four hundred three thousand, two hundred forty-three".