320700243 has 4 divisors (see below), whose sum is σ = 427600328. Its totient is φ = 213800160.

The previous prime is 320700217. The next prime is 320700253. The reversal of 320700243 is 342007023.

It is a happy number.

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

It is not a de Polignac number, because 320700243 - 2¹⁶ = 320634707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320700253) 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, 53450038 + ... + 53450043.

It is an arithmetic number, because the mean of its divisors is an integer number (106900082).

Almost surely, 2^320700243 is an apocalyptic number.

320700243 is a deficient number, since it is larger than the sum of its proper divisors (106900085).

320700243 is a wasteful number, since it uses less digits than its factorization.

320700243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106900084.

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 320700243 is about 17908.1055111924. The cubic root of 320700243 is about 684.4889313127.

Adding to 320700243 its reverse (342007023), we get a palindrome (662707266).

The spelling of 320700243 in words is "three hundred twenty million, seven hundred thousand, two hundred forty-three".