231340320243 has 32 divisors (see below), whose sum is σ = 348941260800. Its totient is φ = 151436284128.

The previous prime is 231340320217. The next prime is 231340320283. The reversal of 231340320243 is 342023043132.

231340320243 is a `hidden beast` number, since 2 + 3 + 13 + 403 + 2 + 0 + 243 = 666.

It is not a de Polignac number, because 231340320243 - 2⁶ = 231340320179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (231340320283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1290621 + ... + 1458897.

It is an arithmetic number, because the mean of its divisors is an integer number (10904414400).

Almost surely, 2^231340320243 is an apocalyptic number.

231340320243 is a deficient number, since it is larger than the sum of its proper divisors (117600940557).

231340320243 is a wasteful number, since it uses less digits than its factorization.

231340320243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169208 (or 169202 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 231340320243 its reverse (342023043132), we get a palindrome (573363363375).

The spelling of 231340320243 in words is "two hundred thirty-one billion, three hundred forty million, three hundred twenty thousand, two hundred forty-three".