521116168 has 32 divisors (see below), whose sum is σ = 995036760. Its totient is φ = 255790080.

The previous prime is 521116163. The next prime is 521116237. The reversal of 521116168 is 861611125.

It can be written as a sum of positive squares in 4 ways, for example, as 516107524 + 5008644 = 22718^2 + 2238^2 .

It is not an unprimeable number, because it can be changed into a prime (521116163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476230 + ... + 477322.

Almost surely, 2^521116168 is an apocalyptic number.

It is an amenable number.

521116168 is a deficient number, since it is larger than the sum of its proper divisors (473920592).

521116168 is a wasteful number, since it uses less digits than its factorization.

521116168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137 (or 2133 counting only the distinct ones).

The product of its digits is 2880, while the sum is 31.

The square root of 521116168 is about 22827.9689854354. The cubic root of 521116168 is about 804.7201002129.

It can be divided in two parts, 521116 and 168, that added together give a square (521284 = 722²).

The spelling of 521116168 in words is "five hundred twenty-one million, one hundred sixteen thousand, one hundred sixty-eight".