212105589 has 4 divisors (see below), whose sum is σ = 282807456. Its totient is φ = 141403724.

The previous prime is 212105567. The next prime is 212105591. The reversal of 212105589 is 985501212.

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 212105589 - 2⁵ = 212105557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212105519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35350929 + ... + 35350934.

It is an arithmetic number, because the mean of its divisors is an integer number (70701864).

Almost surely, 2^212105589 is an apocalyptic number.

It is an amenable number.

212105589 is a deficient number, since it is larger than the sum of its proper divisors (70701867).

212105589 is an equidigital number, since it uses as much as digits as its factorization.

212105589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70701866.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 212105589 is about 14563.8452683349. The cubic root of 212105589 is about 596.3721728824.

The spelling of 212105589 in words is "two hundred twelve million, one hundred five thousand, five hundred eighty-nine".