216164408 has 8 divisors (see below), whose sum is σ = 405308280. Its totient is φ = 108082200.

The previous prime is 216164407. The next prime is 216164411. The reversal of 216164408 is 804461612.

216164408 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216164407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13510268 + ... + 13510283.

It is an arithmetic number, because the mean of its divisors is an integer number (50663535).

Almost surely, 2^216164408 is an apocalyptic number.

It is an amenable number.

216164408 is a deficient number, since it is larger than the sum of its proper divisors (189143872).

216164408 is a wasteful number, since it uses less digits than its factorization.

216164408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27020557 (or 27020553 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 216164408 is about 14702.5306665213. The cubic root of 216164408 is about 600.1521910229.

The spelling of 216164408 in words is "two hundred sixteen million, one hundred sixty-four thousand, four hundred eight".