503316481 has 4 divisors (see below), whose sum is σ = 503369812. Its totient is φ = 503263152.

The previous prime is 503316469. The next prime is 503316511. The reversal of 503316481 is 184613305.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 184613305 = 5 ⋅36922661.

It can be written as a sum of positive squares in 2 ways, for example, as 375739456 + 127577025 = 19384^2 + 11295^2 .

It is a cyclic number.

It is not a de Polignac number, because 503316481 - 2²⁵ = 469762049 is a prime.

It is a super-2 number, since 2×503316481² = 506654960092446722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503316421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8286 + ... + 32791.

It is an arithmetic number, because the mean of its divisors is an integer number (125842453).

It is a Proth number, since it is equal to 15 ⋅ 2²⁵ + 1 and 15 < 2²⁵.

Almost surely, 2^503316481 is an apocalyptic number.

It is an amenable number.

503316481 is a deficient number, since it is larger than the sum of its proper divisors (53331).

503316481 is a wasteful number, since it uses less digits than its factorization.

503316481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53330.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 503316481 is about 22434.7159776985. The cubic root of 503316481 is about 795.4515220510.

Adding to 503316481 its reverse (184613305), we get a palindrome (687929786).

The spelling of 503316481 in words is "five hundred three million, three hundred sixteen thousand, four hundred eighty-one".