231433563 has 16 divisors (see below), whose sum is σ = 332898336. Its totient is φ = 142471680.

The previous prime is 231433549. The next prime is 231433571. The reversal of 231433563 is 365334132.

It is not a de Polignac number, because 231433563 - 2¹² = 231429467 is a prime.

It is a super-2 number, since 2×231433563² = 107122988165749938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231433563.

It is not an unprimeable number, because it can be changed into a prime (231433513) 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 15 ways as a sum of consecutive naturals, for example, 40108 + ... + 45513.

It is an arithmetic number, because the mean of its divisors is an integer number (20806146).

Almost surely, 2^231433563 is an apocalyptic number.

231433563 is a deficient number, since it is larger than the sum of its proper divisors (101464773).

231433563 is a wasteful number, since it uses less digits than its factorization.

231433563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85694.

The product of its digits is 19440, while the sum is 30.

The square root of 231433563 is about 15212.9406427554. The cubic root of 231433563 is about 613.9628788827.

Adding to 231433563 its reverse (365334132), we get a palindrome (596767695).

The spelling of 231433563 in words is "two hundred thirty-one million, four hundred thirty-three thousand, five hundred sixty-three".