231115643 has 8 divisors (see below), whose sum is σ = 254440560. Its totient is φ = 208176480.

The previous prime is 231115631. The next prime is 231115657. The reversal of 231115643 is 346511132.

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 231115643 - 2⁴ = 231115627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231115693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95180 + ... + 97577.

It is an arithmetic number, because the mean of its divisors is an integer number (31805070).

Almost surely, 2^231115643 is an apocalyptic number.

231115643 is a deficient number, since it is larger than the sum of its proper divisors (23324917).

231115643 is a wasteful number, since it uses less digits than its factorization.

231115643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192877.

The product of its digits is 2160, while the sum is 26.

The square root of 231115643 is about 15202.4880529471. The cubic root of 231115643 is about 613.6816167038.

Adding to 231115643 its reverse (346511132), we get a palindrome (577626775).

The spelling of 231115643 in words is "two hundred thirty-one million, one hundred fifteen thousand, six hundred forty-three".