216569472 has 256 divisors, whose sum is σ = 714424320. Its totient is φ = 56770560.

The previous prime is 216569447. The next prime is 216569491. The reversal of 216569472 is 274965612.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1916488 + ... + 1916600.

It is an arithmetic number, because the mean of its divisors is an integer number (2790720).

Almost surely, 2^216569472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216569472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357212160).

216569472 is an abundant number, since it is smaller than the sum of its proper divisors (497854848).

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

216569472 is a wasteful number, since it uses less digits than its factorization.

216569472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 179 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 216569472 is about 14716.2995348695. The cubic root of 216569472 is about 600.5268261771.

The spelling of 216569472 in words is "two hundred sixteen million, five hundred sixty-nine thousand, four hundred seventy-two".