231346643 has 16 divisors (see below), whose sum is σ = 262642176. Its totient is φ = 201932640.

The previous prime is 231346639. The next prime is 231346651. The reversal of 231346643 is 346643132.

231346643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 231346643 - 2² = 231346639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231346943) 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, 23180 + ... + 31622.

It is an arithmetic number, because the mean of its divisors is an integer number (16415136).

Almost surely, 2^231346643 is an apocalyptic number.

231346643 is a deficient number, since it is larger than the sum of its proper divisors (31295533).

231346643 is a wasteful number, since it uses less digits than its factorization.

231346643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554.

The product of its digits is 31104, while the sum is 32.

The square root of 231346643 is about 15210.0835960885. The cubic root of 231346643 is about 613.8860068062.

Adding to 231346643 its reverse (346643132), we get a palindrome (577989775).

The spelling of 231346643 in words is "two hundred thirty-one million, three hundred forty-six thousand, six hundred forty-three".