231136203 has 4 divisors (see below), whose sum is σ = 308181608. Its totient is φ = 154090800.

The previous prime is 231136163. The next prime is 231136207. The reversal of 231136203 is 302631132.

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

It is not a de Polignac number, because 231136203 - 2¹⁶ = 231070667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231136203.

It is not an unprimeable number, because it can be changed into a prime (231136207) 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, 38522698 + ... + 38522703.

It is an arithmetic number, because the mean of its divisors is an integer number (77045402).

Almost surely, 2^231136203 is an apocalyptic number.

231136203 is a deficient number, since it is larger than the sum of its proper divisors (77045405).

231136203 is an equidigital number, since it uses as much as digits as its factorization.

231136203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77045404.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 231136203 is about 15203.1642430120. The cubic root of 231136203 is about 613.6998138276.

Adding to 231136203 its reverse (302631132), we get a palindrome (533767335).

The spelling of 231136203 in words is "two hundred thirty-one million, one hundred thirty-six thousand, two hundred three".