212246889 has 4 divisors (see below), whose sum is σ = 282995856. Its totient is φ = 141497924.

The previous prime is 212246857. The next prime is 212246899. The reversal of 212246889 is 988642212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212246889 - 2⁵ = 212246857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212246889.

It is not an unprimeable number, because it can be changed into a prime (212246809) 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, 35374479 + ... + 35374484.

It is an arithmetic number, because the mean of its divisors is an integer number (70748964).

Almost surely, 2^212246889 is an apocalyptic number.

It is an amenable number.

212246889 is a deficient number, since it is larger than the sum of its proper divisors (70748967).

212246889 is an equidigital number, since it uses as much as digits as its factorization.

212246889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70748966.

The product of its digits is 110592, while the sum is 42.

The square root of 212246889 is about 14568.6955146986. The cubic root of 212246889 is about 596.5045734209.

The spelling of 212246889 in words is "two hundred twelve million, two hundred forty-six thousand, eight hundred eighty-nine".