212817168 has 30 divisors (see below), whose sum is σ = 595592894. Its totient is φ = 70939008.

The previous prime is 212817149. The next prime is 212817173. The reversal of 212817168 is 861718212.

It can be written as a sum of positive squares in only one way, i.e., 175509504 + 37307664 = 13248^2 + 6108^2 .

It is a super-2 number, since 2×212817168² = 90582293991080448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 5 ways as a sum of consecutive naturals, for example, 738805 + ... + 739092.

Almost surely, 2^212817168 is an apocalyptic number.

It is an amenable number.

212817168 is an abundant number, since it is smaller than the sum of its proper divisors (382775726).

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

212817168 is a wasteful number, since it uses less digits than its factorization.

212817168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477911 (or 1477902 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 212817168 is about 14588.2544534979. The cubic root of 212817168 is about 597.0383383206.

The spelling of 212817168 in words is "two hundred twelve million, eight hundred seventeen thousand, one hundred sixty-eight".