231231163 has 4 divisors (see below), whose sum is σ = 232783200. Its totient is φ = 229679128.

The previous prime is 231231151. The next prime is 231231179. The reversal of 231231163 is 361132132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231231163 - 2⁵ = 231231131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231231863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775795 + ... + 776092.

It is an arithmetic number, because the mean of its divisors is an integer number (58195800).

Almost surely, 2^231231163 is an apocalyptic number.

231231163 is a deficient number, since it is larger than the sum of its proper divisors (1552037).

231231163 is a wasteful number, since it uses less digits than its factorization.

231231163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552036.

The product of its digits is 648, while the sum is 22.

The square root of 231231163 is about 15206.2869563875. The cubic root of 231231163 is about 613.7838464666.

Adding to 231231163 its reverse (361132132), we get a palindrome (592363295).

The spelling of 231231163 in words is "two hundred thirty-one million, two hundred thirty-one thousand, one hundred sixty-three".