502031313 has 18 divisors (see below), whose sum is σ = 843549954. Its totient is φ = 286874784.

The previous prime is 502031311. The next prime is 502031339. The reversal of 502031313 is 313130205.

It can be written as a sum of positive squares in only one way, i.e., 488984769 + 13046544 = 22113^2 + 3612^2 .

It is not a de Polignac number, because 502031313 - 2¹ = 502031311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (502031311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 568756 + ... + 569637.

Almost surely, 2^502031313 is an apocalyptic number.

It is an amenable number.

502031313 is a deficient number, since it is larger than the sum of its proper divisors (341518641).

502031313 is a wasteful number, since it uses less digits than its factorization.

502031313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138413 (or 1138403 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 502031313 is about 22406.0552753045. The cubic root of 502031313 is about 794.7739098391.

Adding to 502031313 its reverse (313130205), we get a palindrome (815161518).

The spelling of 502031313 in words is "five hundred two million, thirty-one thousand, three hundred thirteen".