231244543 has 4 divisors (see below), whose sum is σ = 232166088. Its totient is φ = 230323000.

The previous prime is 231244529. The next prime is 231244547. The reversal of 231244543 is 345442132.

It is a happy number.

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 231244543 - 2⁵ = 231244511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231244547) 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, 460396 + ... + 460897.

It is an arithmetic number, because the mean of its divisors is an integer number (58041522).

Almost surely, 2^231244543 is an apocalyptic number.

231244543 is a deficient number, since it is larger than the sum of its proper divisors (921545).

231244543 is an equidigital number, since it uses as much as digits as its factorization.

231244543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921544.

The product of its digits is 11520, while the sum is 28.

The square root of 231244543 is about 15206.7268996323. The cubic root of 231244543 is about 613.7956849364.

Adding to 231244543 its reverse (345442132), we get a palindrome (576686675).

The spelling of 231244543 in words is "two hundred thirty-one million, two hundred forty-four thousand, five hundred forty-three".