43216164 has 18 divisors (see below), whose sum is σ = 109240950. Its totient is φ = 14405376.

The previous prime is 43216163. The next prime is 43216181. The reversal of 43216164 is 46161234.

43216164 is a `hidden beast` number, since 43 + 2 + 1 + 616 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28836900 + 14379264 = 5370^2 + 3792^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (43216163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 600189 + ... + 600260.

Almost surely, 2^43216164 is an apocalyptic number.

It is an amenable number.

43216164 is an abundant number, since it is smaller than the sum of its proper divisors (66024786).

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

43216164 is a wasteful number, since it uses less digits than its factorization.

43216164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200459 (or 1200454 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 43216164 is about 6573.9002122028. The cubic root of 43216164 is about 350.9258859273.

Adding to 43216164 its reverse (46161234), we get a palindrome (89377398).

The spelling of 43216164 in words is "forty-three million, two hundred sixteen thousand, one hundred sixty-four".