500123231 has 2 divisors, whose sum is σ = 500123232. Its totient is φ = 500123230.

The previous prime is 500123213. The next prime is 500123233. The reversal of 500123231 is 132321005.

Together with previous prime (500123213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-500123231 is a prime.

It is a super-2 number, since 2×500123231² = 500246492371758722, which contains 22 as substring.

Together with 500123233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500123233) 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 as a sum of consecutive naturals, namely, 250061615 + 250061616.

It is an arithmetic number, because the mean of its divisors is an integer number (250061616).

Almost surely, 2^500123231 is an apocalyptic number.

500123231 is a deficient number, since it is larger than the sum of its proper divisors (1).

500123231 is an equidigital number, since it uses as much as digits as its factorization.

500123231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 500123231 is about 22363.4351341649. The cubic root of 500123231 is about 793.7657263009.

Adding to 500123231 its reverse (132321005), we get a palindrome (632444236).

The spelling of 500123231 in words is "five hundred million, one hundred twenty-three thousand, two hundred thirty-one".