216312528 has 20 divisors (see below), whose sum is σ = 558807488. Its totient is φ = 72104160.

The previous prime is 216312497. The next prime is 216312533. The reversal of 216312528 is 825213612.

It is a super-2 number, since 2×216312528² = 93582219539501568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216312495 and 216312504.

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, 2253208 + ... + 2253303.

Almost surely, 2^216312528 is an apocalyptic number.

It is an amenable number.

216312528 is an abundant number, since it is smaller than the sum of its proper divisors (342494960).

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

216312528 is a wasteful number, since it uses less digits than its factorization.

216312528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506522 (or 4506516 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 216312528 is about 14707.5670319737. The cubic root of 216312528 is about 600.2892383240.

The spelling of 216312528 in words is "two hundred sixteen million, three hundred twelve thousand, five hundred twenty-eight".