212170 has 24 divisors (see below), whose sum is σ = 445284. Its totient is φ = 72576.

The previous prime is 212167. The next prime is 212183. The reversal of 212170 is 71212.

212170 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 17689 = 441^2 + 133^2 .

It is a super-2 number, since 2×212170² = 90032217800, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 212170.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274 + ... + 706.

2²¹²¹⁷⁰ is an apocalyptic number.

212170 is an abundant number, since it is smaller than the sum of its proper divisors (233114).

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

212170 is a wasteful number, since it uses less digits than its factorization.

212170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 212170 is about 460.6191485381. The cubic root of 212170 is about 59.6432534392.

Adding to 212170 its reverse (71212), we get a palindrome (283382).

The spelling of 212170 in words is "two hundred twelve thousand, one hundred seventy", and thus it is an iban number.