503123231 has 8 divisors (see below), whose sum is σ = 542066784. Its totient is φ = 464214240.

The previous prime is 503123197. The next prime is 503123239. The reversal of 503123231 is 132321305.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503123231 is a prime.

It is a super-2 number, since 2×503123231² = 506265971143758722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503123239) 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 7 ways as a sum of consecutive naturals, for example, 27101 + ... + 41721.

It is an arithmetic number, because the mean of its divisors is an integer number (67758348).

Almost surely, 2^503123231 is an apocalyptic number.

503123231 is a deficient number, since it is larger than the sum of its proper divisors (38943553).

503123231 is a wasteful number, since it uses less digits than its factorization.

503123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17281.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 503123231 is about 22430.4086231170. The cubic root of 503123231 is about 795.3497036190.

Adding to 503123231 its reverse (132321305), we get a palindrome (635444536).

The spelling of 503123231 in words is "five hundred three million, one hundred twenty-three thousand, two hundred thirty-one".