231781163 has 8 divisors (see below), whose sum is σ = 234677520. Its totient is φ = 228896800.

The previous prime is 231781139. The next prime is 231781183. The reversal of 231781163 is 361187132.

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 231781163 - 2¹⁴ = 231764779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231781103) 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, 39581 + ... + 45057.

It is an arithmetic number, because the mean of its divisors is an integer number (29334690).

Almost surely, 2^231781163 is an apocalyptic number.

231781163 is a deficient number, since it is larger than the sum of its proper divisors (2896357).

231781163 is a wasteful number, since it uses less digits than its factorization.

231781163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5997.

The product of its digits is 6048, while the sum is 32.

The square root of 231781163 is about 15224.3608404425. The cubic root of 231781163 is about 614.2701041875.

The spelling of 231781163 in words is "two hundred thirty-one million, seven hundred eighty-one thousand, one hundred sixty-three".