516820203 has 8 divisors (see below), whose sum is σ = 765659600. Its totient is φ = 344546784.

The previous prime is 516820193. The next prime is 516820219. The reversal of 516820203 is 302028615.

It is not a de Polignac number, because 516820203 - 2¹² = 516816107 is a prime.

It is a super-2 number, since 2×516820203² = 534206244457922418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 19141489 = 516820203 / (5 + 1 + 6 + 8 + 2 + 0 + 2 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516821203) 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 7 ways as a sum of consecutive naturals, for example, 9570718 + ... + 9570771.

It is an arithmetic number, because the mean of its divisors is an integer number (95707450).

Almost surely, 2^516820203 is an apocalyptic number.

516820203 is a deficient number, since it is larger than the sum of its proper divisors (248839397).

516820203 is a wasteful number, since it uses less digits than its factorization.

516820203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19141498 (or 19141492 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 516820203 is about 22733.6799264879. The cubic root of 516820203 is about 802.5026849417.

Adding to 516820203 its reverse (302028615), we get a palindrome (818848818).

The spelling of 516820203 in words is "five hundred sixteen million, eight hundred twenty thousand, two hundred three".