231173563 has 4 divisors (see below), whose sum is σ = 231207760. Its totient is φ = 231139368.

The previous prime is 231173561. The next prime is 231173611. The reversal of 231173563 is 365371132.

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 231173563 - 2¹ = 231173561 is a prime.

It is a super-2 number, since 2×231173563² = 106882432460229938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231173561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3183 + ... + 21736.

It is an arithmetic number, because the mean of its divisors is an integer number (57801940).

Almost surely, 2^231173563 is an apocalyptic number.

231173563 is a deficient number, since it is larger than the sum of its proper divisors (34197).

231173563 is an equidigital number, since it uses as much as digits as its factorization.

231173563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34196.

The product of its digits is 11340, while the sum is 31.

The square root of 231173563 is about 15204.3928849527. The cubic root of 231173563 is about 613.7328774347.

The spelling of 231173563 in words is "two hundred thirty-one million, one hundred seventy-three thousand, five hundred sixty-three".