503425165321 has 4 divisors (see below), whose sum is σ = 542150178052. Its totient is φ = 464700152592.

The previous prime is 503425165273. The next prime is 503425165333. The reversal of 503425165321 is 123561524305.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 192690271225 + 310734894096 = 438965^2 + 557436^2 .

It is not a de Polignac number, because 503425165321 - 2¹¹ = 503425163273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503425165351) 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, 19362506346 + ... + 19362506371.

It is an arithmetic number, because the mean of its divisors is an integer number (135537544513).

Almost surely, 2^503425165321 is an apocalyptic number.

It is an amenable number.

503425165321 is a deficient number, since it is larger than the sum of its proper divisors (38725012731).

503425165321 is a wasteful number, since it uses less digits than its factorization.

503425165321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38725012730.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 503425165321 its reverse (123561524305), we get a palindrome (626986689626).

It can be divided in two parts, 503425 and 165321, that added together give a triangular number (668746 = T₁₁₅₆).

The spelling of 503425165321 in words is "five hundred three billion, four hundred twenty-five million, one hundred sixty-five thousand, three hundred twenty-one".