164420216 has 8 divisors (see below), whose sum is σ = 308287920. Its totient is φ = 82210104.

The previous prime is 164420213. The next prime is 164420231. The reversal of 164420216 is 612024461.

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

It is a super-3 number, since 3×164420216³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164420213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276256 + ... + 10276271.

It is an arithmetic number, because the mean of its divisors is an integer number (38535990).

Almost surely, 2^164420216 is an apocalyptic number.

It is an amenable number.

164420216 is a deficient number, since it is larger than the sum of its proper divisors (143867704).

164420216 is a wasteful number, since it uses less digits than its factorization.

164420216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20552533 (or 20552529 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 164420216 is about 12822.6446570121. The cubic root of 164420216 is about 547.8374764459.

Adding to 164420216 its reverse (612024461), we get a palindrome (776444677).

The spelling of 164420216 in words is "one hundred sixty-four million, four hundred twenty thousand, two hundred sixteen".