231302243 has 4 divisors (see below), whose sum is σ = 235222680. Its totient is φ = 227381808.

The previous prime is 231302213. The next prime is 231302293. The reversal of 231302243 is 342203132.

231302243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 231302243 - 2²² = 227107939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231302213) 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, 1960130 + ... + 1960247.

It is an arithmetic number, because the mean of its divisors is an integer number (58805670).

Almost surely, 2^231302243 is an apocalyptic number.

231302243 is a deficient number, since it is larger than the sum of its proper divisors (3920437).

231302243 is an equidigital number, since it uses as much as digits as its factorization.

231302243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920436.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 231302243 is about 15208.6239679992. The cubic root of 231302243 is about 613.8467320016.

Adding to 231302243 its reverse (342203132), we get a palindrome (573505375).

The spelling of 231302243 in words is "two hundred thirty-one million, three hundred two thousand, two hundred forty-three".