503233423661 has 4 divisors (see below), whose sum is σ = 503464372800. Its totient is φ = 503002474524.

The previous prime is 503233423601. The next prime is 503233423783. The reversal of 503233423661 is 166324332305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503233423661 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 (503233423601) 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, 115471301 + ... + 115475658.

It is an arithmetic number, because the mean of its divisors is an integer number (125866093200).

Almost surely, 2^503233423661 is an apocalyptic number.

It is an amenable number.

503233423661 is a deficient number, since it is larger than the sum of its proper divisors (230949139).

503233423661 is a wasteful number, since it uses less digits than its factorization.

503233423661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230949138.

The product of its (nonzero) digits is 233280, while the sum is 38.

Adding to 503233423661 its reverse (166324332305), we get a palindrome (669557755966).

The spelling of 503233423661 in words is "five hundred three billion, two hundred thirty-three million, four hundred twenty-three thousand, six hundred sixty-one".