503234205621 has 12 divisors (see below), whose sum is σ = 780526523232. Its totient is φ = 287562403128.

The previous prime is 503234205611. The next prime is 503234205641. The reversal of 503234205621 is 126502432305.

It is a happy number.

It is not a de Polignac number, because 503234205621 - 2⁶ = 503234205557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503234205611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1711680825 + ... + 1711681118.

It is an arithmetic number, because the mean of its divisors is an integer number (65043876936).

Almost surely, 2^503234205621 is an apocalyptic number.

It is an amenable number.

503234205621 is a deficient number, since it is larger than the sum of its proper divisors (277292317611).

503234205621 is a wasteful number, since it uses less digits than its factorization.

503234205621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423361960 (or 3423361953 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 503234205621 its reverse (126502432305), we get a palindrome (629736637926).

The spelling of 503234205621 in words is "five hundred three billion, two hundred thirty-four million, two hundred five thousand, six hundred twenty-one".