231533163 has 6 divisors (see below), whose sum is σ = 334436804. Its totient is φ = 154355436.

The previous prime is 231533153. The next prime is 231533171. The reversal of 231533163 is 361335132.

It is a happy number.

It is not a de Polignac number, because 231533163 - 2⁸ = 231532907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231533123) 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 5 ways as a sum of consecutive naturals, for example, 12862945 + ... + 12862962.

Almost surely, 2^231533163 is an apocalyptic number.

231533163 is a deficient number, since it is larger than the sum of its proper divisors (102903641).

231533163 is a wasteful number, since it uses less digits than its factorization.

231533163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25725913 (or 25725910 counting only the distinct ones).

The product of its digits is 4860, while the sum is 27.

The square root of 231533163 is about 15216.2138194756. The cubic root of 231533163 is about 614.0509414952.

Adding to 231533163 its reverse (361335132), we get a palindrome (592868295).

The spelling of 231533163 in words is "two hundred thirty-one million, five hundred thirty-three thousand, one hundred sixty-three".