503661316 has 12 divisors (see below), whose sum is σ = 905229388. Its totient is φ = 245024352.

The previous prime is 503661313. The next prime is 503661317. The reversal of 503661316 is 613166305.

It can be written as a sum of positive squares in 2 ways, for example, as 202777600 + 300883716 = 14240^2 + 17346^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (503661313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1701411 + ... + 1701706.

Almost surely, 2^503661316 is an apocalyptic number.

It is an amenable number.

503661316 is a deficient number, since it is larger than the sum of its proper divisors (401568072).

503661316 is a wasteful number, since it uses less digits than its factorization.

503661316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403158 (or 3403156 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 503661316 is about 22442.3999607885. The cubic root of 503661316 is about 795.6331419771.

The spelling of 503661316 in words is "five hundred three million, six hundred sixty-one thousand, three hundred sixteen".