231130503 has 20 divisors (see below), whose sum is σ = 350430520. Its totient is φ = 151783632.

The previous prime is 231130499. The next prime is 231130511. The reversal of 231130503 is 305031132.

231130503 is a `hidden beast` number, since 2 + 31 + 130 + 503 = 666.

It is not a de Polignac number, because 231130503 - 2² = 231130499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231130583) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15868 + ... + 26721.

It is an arithmetic number, because the mean of its divisors is an integer number (17521526).

Almost surely, 2^231130503 is an apocalyptic number.

231130503 is a deficient number, since it is larger than the sum of its proper divisors (119300017).

231130503 is an equidigital number, since it uses as much as digits as its factorization.

231130503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42668 (or 42659 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 231130503 is about 15202.9767808808. The cubic root of 231130503 is about 613.6947690132.

Adding to 231130503 its reverse (305031132), we get a palindrome (536161635).

The spelling of 231130503 in words is "two hundred thirty-one million, one hundred thirty thousand, five hundred three".