216352564 has 12 divisors (see below), whose sum is σ = 378850500. Its totient is φ = 108109568.

The previous prime is 216352561. The next prime is 216352573. The reversal of 216352564 is 465253612.

216352564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117548964 + 98803600 = 10842^2 + 9940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216352561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8989 + ... + 22660.

It is an arithmetic number, because the mean of its divisors is an integer number (31570875).

Almost surely, 2^216352564 is an apocalyptic number.

It is an amenable number.

216352564 is a deficient number, since it is larger than the sum of its proper divisors (162497936).

216352564 is a wasteful number, since it uses less digits than its factorization.

216352564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33362 (or 33360 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 216352564 is about 14708.9280370801. The cubic root of 216352564 is about 600.3262706950.

The spelling of 216352564 in words is "two hundred sixteen million, three hundred fifty-two thousand, five hundred sixty-four".