231211563 has 16 divisors (see below), whose sum is σ = 339398400. Its totient is φ = 138840480.

The previous prime is 231211553. The next prime is 231211567. The reversal of 231211563 is 365112132.

It is not a de Polignac number, because 231211563 - 2⁶ = 231211499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231211567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28543 + ... + 35736.

It is an arithmetic number, because the mean of its divisors is an integer number (21212400).

Almost surely, 2^231211563 is an apocalyptic number.

231211563 is a deficient number, since it is larger than the sum of its proper divisors (108186837).

231211563 is a wasteful number, since it uses less digits than its factorization.

231211563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64402.

The product of its digits is 1080, while the sum is 24.

The square root of 231211563 is about 15205.6424724508. The cubic root of 231211563 is about 613.7665037878.

Adding to 231211563 its reverse (365112132), we get a palindrome (596323695).

The spelling of 231211563 in words is "two hundred thirty-one million, two hundred eleven thousand, five hundred sixty-three".