516172812 has 12 divisors (see below), whose sum is σ = 1204403256. Its totient is φ = 172057600.

The previous prime is 516172781. The next prime is 516172823. The reversal of 516172812 is 218271615.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21507189 + ... + 21507212.

It is an arithmetic number, because the mean of its divisors is an integer number (100366938).

Almost surely, 2^516172812 is an apocalyptic number.

It is an amenable number.

516172812 is an abundant number, since it is smaller than the sum of its proper divisors (688230444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

516172812 is a wasteful number, since it uses less digits than its factorization.

516172812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43014408 (or 43014406 counting only the distinct ones).

The product of its digits is 6720, while the sum is 33.

The square root of 516172812 is about 22719.4368768242. The cubic root of 516172812 is about 802.1674619160.

The spelling of 516172812 in words is "five hundred sixteen million, one hundred seventy-two thousand, eight hundred twelve".