216173222 has 32 divisors (see below), whose sum is σ = 348986880. Its totient is φ = 100124640.

The previous prime is 216173219. The next prime is 216173233. The reversal of 216173222 is 222371612.

It is a super-2 number, since 2×216173222² = 93461723819722568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216173191 and 216173200.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 501347 + ... + 501777.

It is an arithmetic number, because the mean of its divisors is an integer number (10905840).

Almost surely, 2^216173222 is an apocalyptic number.

216173222 is a deficient number, since it is larger than the sum of its proper divisors (132813658).

216173222 is a wasteful number, since it uses less digits than its factorization.

216173222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716.

The product of its digits is 2016, while the sum is 26.

The square root of 216173222 is about 14702.8304077820. The cubic root of 216173222 is about 600.1603478845.

The spelling of 216173222 in words is "two hundred sixteen million, one hundred seventy-three thousand, two hundred twenty-two".