521163672 has 16 divisors (see below), whose sum is σ = 1302909240. Its totient is φ = 173721216.

The previous prime is 521163659. The next prime is 521163689. The reversal of 521163672 is 276361125.

It is a super-2 number, since 2×521163672² = 543223146025047168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10857553 + ... + 10857600.

Almost surely, 2^521163672 is an apocalyptic number.

It is an amenable number.

521163672 is an abundant number, since it is smaller than the sum of its proper divisors (781745568).

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

521163672 is a wasteful number, since it uses less digits than its factorization.

521163672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21715162 (or 21715158 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 521163672 is about 22829.0094397457. The cubic root of 521163672 is about 804.7445517425.

The spelling of 521163672 in words is "five hundred twenty-one million, one hundred sixty-three thousand, six hundred seventy-two".