212211670 has 16 divisors (see below), whose sum is σ = 416706768. Its totient is φ = 77167840.

The previous prime is 212211607. The next prime is 212211677. The reversal of 212211670 is 76112212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964489 + ... + 964708.

It is an arithmetic number, because the mean of its divisors is an integer number (26044173).

Almost surely, 2^212211670 is an apocalyptic number.

212211670 is a deficient number, since it is larger than the sum of its proper divisors (204495098).

212211670 is a wasteful number, since it uses less digits than its factorization.

212211670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929215.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 212211670 is about 14567.4867427432. The cubic root of 212211670 is about 596.4715781094.

Adding to 212211670 its reverse (76112212), we get a palindrome (288323882).

The spelling of 212211670 in words is "two hundred twelve million, two hundred eleven thousand, six hundred seventy".