216173364 has 24 divisors (see below), whose sum is σ = 550259808. Its totient is φ = 65507040.

The previous prime is 216173333. The next prime is 216173369. The reversal of 216173364 is 463371612.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216173369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818707 + ... + 818970.

It is an arithmetic number, because the mean of its divisors is an integer number (22927492).

Almost surely, 2^216173364 is an apocalyptic number.

It is an amenable number.

216173364 is an abundant number, since it is smaller than the sum of its proper divisors (334086444).

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

216173364 is a wasteful number, since it uses less digits than its factorization.

216173364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637695 (or 1637693 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 216173364 is about 14702.8352367834. The cubic root of 216173364 is about 600.1604792957.

The spelling of 216173364 in words is "two hundred sixteen million, one hundred seventy-three thousand, three hundred sixty-four".