216164472 has 16 divisors (see below), whose sum is σ = 540411240. Its totient is φ = 72054816.

The previous prime is 216164467. The next prime is 216164489. The reversal of 216164472 is 274461612.

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, 4503403 + ... + 4503450.

Almost surely, 2^216164472 is an apocalyptic number.

It is an amenable number.

216164472 is an abundant number, since it is smaller than the sum of its proper divisors (324246768).

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

216164472 is a wasteful number, since it uses less digits than its factorization.

216164472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9006862 (or 9006858 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 216164472 is about 14702.5328430172. The cubic root of 216164472 is about 600.1522502521.

The spelling of 216164472 in words is "two hundred sixteen million, one hundred sixty-four thousand, four hundred seventy-two".