212006670 has 32 divisors (see below), whose sum is σ = 522570528. Its totient is φ = 55006848.

The previous prime is 212006629. The next prime is 212006671. The reversal of 212006670 is 76600212.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212006670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212006671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94389 + ... + 96608.

It is an arithmetic number, because the mean of its divisors is an integer number (16330329).

Almost surely, 2^212006670 is an apocalyptic number.

212006670 is an abundant number, since it is smaller than the sum of its proper divisors (310563858).

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

212006670 is a wasteful number, since it uses less digits than its factorization.

212006670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191044.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 212006670 is about 14560.4488254999. The cubic root of 212006670 is about 596.2794490771.

Adding to 212006670 its reverse (76600212), we get a palindrome (288606882).

The spelling of 212006670 in words is "two hundred twelve million, six thousand, six hundred seventy".