231240243 has 16 divisors (see below), whose sum is σ = 332531360. Its totient is φ = 142089984.

The previous prime is 231240199. The next prime is 231240263. The reversal of 231240243 is 342042132.

231240243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231240243 - 2⁶ = 231240179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231240263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24543 + ... + 32631.

It is an arithmetic number, because the mean of its divisors is an integer number (20783210).

Almost surely, 2^231240243 is an apocalyptic number.

231240243 is a deficient number, since it is larger than the sum of its proper divisors (101291117).

231240243 is a wasteful number, since it uses less digits than its factorization.

231240243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8838.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 231240243 is about 15206.5855141777. The cubic root of 231240243 is about 613.7918803958.

Adding to 231240243 its reverse (342042132), we get a palindrome (573282375).

The spelling of 231240243 in words is "two hundred thirty-one million, two hundred forty thousand, two hundred forty-three".