212105343 has 4 divisors (see below), whose sum is σ = 282807128. Its totient is φ = 141403560.

The previous prime is 212105323. The next prime is 212105347. The reversal of 212105343 is 343501212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212105343 - 2⁶ = 212105279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212105347) 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, 35350888 + ... + 35350893.

It is an arithmetic number, because the mean of its divisors is an integer number (70701782).

Almost surely, 2^212105343 is an apocalyptic number.

212105343 is a deficient number, since it is larger than the sum of its proper divisors (70701785).

212105343 is an equidigital number, since it uses as much as digits as its factorization.

212105343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70701784.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 212105343 is about 14563.8368227607. The cubic root of 212105343 is about 596.3719423249.

Adding to 212105343 its reverse (343501212), we get a palindrome (555606555).

The spelling of 212105343 in words is "two hundred twelve million, one hundred five thousand, three hundred forty-three".