173215216 has 20 divisors (see below), whose sum is σ = 336241624. Its totient is φ = 86443200.

The previous prime is 173215213. The next prime is 173215243. The reversal of 173215216 is 612512371.

It is a happy number.

It is a super-2 number, since 2×173215216² = 60007022107853312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173215213) 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 3 ways as a sum of consecutive naturals, for example, 1350 + ... + 18661.

Almost surely, 2^173215216 is an apocalyptic number.

173215216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

173215216 is a deficient number, since it is larger than the sum of its proper divisors (163026408).

173215216 is a wasteful number, since it uses less digits than its factorization.

173215216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20560 (or 20554 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 173215216 is about 13161.1251798621. The cubic root of 173215216 is about 557.4364286338.

Adding to 173215216 its reverse (612512371), we get a palindrome (785727587).

The spelling of 173215216 in words is "one hundred seventy-three million, two hundred fifteen thousand, two hundred sixteen".