231216743 has 8 divisors (see below), whose sum is σ = 232552320. Its totient is φ = 229885560.

The previous prime is 231216709. The next prime is 231216761. The reversal of 231216743 is 347612132.

It is a happy number.

231216743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231216743 - 2¹² = 231212647 is a prime.

It is a super-2 number, since 2×231216743² = 106922364487056098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231216763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174638 + ... + 175956.

It is an arithmetic number, because the mean of its divisors is an integer number (29069040).

Almost surely, 2^231216743 is an apocalyptic number.

231216743 is a deficient number, since it is larger than the sum of its proper divisors (1335577).

231216743 is a wasteful number, since it uses less digits than its factorization.

231216743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197.

The product of its digits is 6048, while the sum is 29.

The square root of 231216743 is about 15205.8128030040. The cubic root of 231216743 is about 613.7710873054.

Adding to 231216743 its reverse (347612132), we get a palindrome (578828875).

The spelling of 231216743 in words is "two hundred thirty-one million, two hundred sixteen thousand, seven hundred forty-three".