521163516 has 24 divisors (see below), whose sum is σ = 1217017984. Its totient is φ = 173582640.

The previous prime is 521163491. The next prime is 521163529. The reversal of 521163516 is 615361125.

It is a super-2 number, since 2×521163516² = 543222820818964512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1030 + ... + 32301.

Almost surely, 2^521163516 is an apocalyptic number.

It is an amenable number.

521163516 is an abundant number, since it is smaller than the sum of its proper divisors (695854468).

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

521163516 is a wasteful number, since it uses less digits than its factorization.

521163516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34641 (or 34639 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 521163516 is about 22829.0060230401. The cubic root of 521163516 is about 804.7444714477.

The spelling of 521163516 in words is "five hundred twenty-one million, one hundred sixty-three thousand, five hundred sixteen".