503130813 has 4 divisors (see below), whose sum is σ = 670841088. Its totient is φ = 335420540.

The previous prime is 503130769. The next prime is 503130869. The reversal of 503130813 is 318031305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 503130813 - 2⁹ = 503130301 is a prime.

It is a super-3 number, since 3×503130813³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503130893) 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, 83855133 + ... + 83855138.

It is an arithmetic number, because the mean of its divisors is an integer number (167710272).

Almost surely, 2^503130813 is an apocalyptic number.

It is an amenable number.

503130813 is a deficient number, since it is larger than the sum of its proper divisors (167710275).

503130813 is a wasteful number, since it uses less digits than its factorization.

503130813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167710274.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 503130813 is about 22430.5776341137. The cubic root of 503130813 is about 795.3536988702.

The spelling of 503130813 in words is "five hundred three million, one hundred thirty thousand, eight hundred thirteen".