231681163 has 12 divisors (see below), whose sum is σ = 269819760. Its totient is φ = 198353232.

The previous prime is 231681157. The next prime is 231681181. The reversal of 231681163 is 361186132.

It is not a de Polignac number, because 231681163 - 2⁹ = 231680651 is a prime.

It is a super-2 number, since 2×231681163² = 107352322578065138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231661163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50170 + ... + 54592.

It is an arithmetic number, because the mean of its divisors is an integer number (22484980).

Almost surely, 2^231681163 is an apocalyptic number.

231681163 is a deficient number, since it is larger than the sum of its proper divisors (38138597).

231681163 is a wasteful number, since it uses less digits than its factorization.

231681163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5506 (or 5499 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 231681163 is about 15221.0762760062. The cubic root of 231681163 is about 614.1817509527.

The spelling of 231681163 in words is "two hundred thirty-one million, six hundred eighty-one thousand, one hundred sixty-three".