231781998343 has 8 divisors (see below), whose sum is σ = 264981362688. Its totient is φ = 198604546584.

The previous prime is 231781998323. The next prime is 231781998361. The reversal of 231781998343 is 343899187132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231781998343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231781998323) 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, 5455471 + ... + 5497792.

It is an arithmetic number, because the mean of its divisors is an integer number (33122670336).

Almost surely, 2^231781998343 is an apocalyptic number.

231781998343 is a deficient number, since it is larger than the sum of its proper divisors (33199364345).

231781998343 is a wasteful number, since it uses less digits than its factorization.

231781998343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10956293.

The product of its digits is 7838208, while the sum is 58.

The spelling of 231781998343 in words is "two hundred thirty-one billion, seven hundred eighty-one million, nine hundred ninety-eight thousand, three hundred forty-three".