517138228 has 6 divisors (see below), whose sum is σ = 904991906. Its totient is φ = 258569112.

The previous prime is 517138213. The next prime is 517138229. The reversal of 517138228 is 822831715.

It can be written as a sum of positive squares in only one way, i.e., 359936784 + 157201444 = 18972^2 + 12538^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517138229) 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 as a sum of consecutive naturals, namely, 64642275 + ... + 64642282.

Almost surely, 2^517138228 is an apocalyptic number.

It is an amenable number.

517138228 is a deficient number, since it is larger than the sum of its proper divisors (387853678).

517138228 is a wasteful number, since it uses less digits than its factorization.

517138228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129284561 (or 129284559 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 517138228 is about 22740.6734289027. The cubic root of 517138228 is about 802.6672577040.

The spelling of 517138228 in words is "five hundred seventeen million, one hundred thirty-eight thousand, two hundred twenty-eight".