212943 has 4 divisors (see below), whose sum is σ = 283928. Its totient is φ = 141960.

The previous prime is 212923. The next prime is 212969. The reversal of 212943 is 349212.

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

It is not a de Polignac number, because 212943 - 2¹³ = 204751 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

212943 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 212943.

It is not an unprimeable number, because it can be changed into a prime (212903) 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, 35488 + ... + 35493.

It is an arithmetic number, because the mean of its divisors is an integer number (70982).

2²¹²⁹⁴³ is an apocalyptic number.

212943 is a deficient number, since it is larger than the sum of its proper divisors (70985).

212943 is an equidigital number, since it uses as much as digits as its factorization.

212943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70984.

The product of its digits is 432, while the sum is 21.

The square root of 212943 is about 461.4574736636. The cubic root of 212943 is about 59.7155985042.

The spelling of 212943 in words is "two hundred twelve thousand, nine hundred forty-three".