503425301621 has 16 divisors (see below), whose sum is σ = 564270451200. Its totient is φ = 445103714880.

The previous prime is 503425301597. The next prime is 503425301623. The reversal of 503425301621 is 126103524305.

It is a happy number.

It is not a de Polignac number, because 503425301621 - 2¹⁰ = 503425300597 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 (503425301623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718595 + ... + 1234191.

It is an arithmetic number, because the mean of its divisors is an integer number (35266903200).

Almost surely, 2^503425301621 is an apocalyptic number.

It is an amenable number.

503425301621 is a deficient number, since it is larger than the sum of its proper divisors (60845149579).

503425301621 is a wasteful number, since it uses less digits than its factorization.

503425301621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518044.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 503425301621 its reverse (126103524305), we get a palindrome (629528825926).

The spelling of 503425301621 in words is "five hundred three billion, four hundred twenty-five million, three hundred one thousand, six hundred twenty-one".