212231443 has 4 divisors (see below), whose sum is σ = 212375088. Its totient is φ = 212087800.

The previous prime is 212231431. The next prime is 212231471. The reversal of 212231443 is 344132212.

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

It is a cyclic number.

It is not a de Polignac number, because 212231443 - 2²⁵ = 178677011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212231423) 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, 69583 + ... + 72568.

It is an arithmetic number, because the mean of its divisors is an integer number (53093772).

Almost surely, 2^212231443 is an apocalyptic number.

212231443 is a deficient number, since it is larger than the sum of its proper divisors (143645).

212231443 is a wasteful number, since it uses less digits than its factorization.

212231443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143644.

The product of its digits is 1152, while the sum is 22.

The square root of 212231443 is about 14568.1653958211. The cubic root of 212231443 is about 596.4901031136.

Adding to 212231443 its reverse (344132212), we get a palindrome (556363655).

The spelling of 212231443 in words is "two hundred twelve million, two hundred thirty-one thousand, four hundred forty-three".