212242643 has 8 divisors (see below), whose sum is σ = 224591616. Its totient is φ = 200153800.

The previous prime is 212242601. The next prime is 212242649. The reversal of 212242643 is 346242212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212242643 - 2¹⁶ = 212177107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212242649) 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 7 ways as a sum of consecutive naturals, for example, 63353 + ... + 66618.

It is an arithmetic number, because the mean of its divisors is an integer number (28073952).

Almost surely, 2^212242643 is an apocalyptic number.

212242643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212242643 is a deficient number, since it is larger than the sum of its proper divisors (12348973).

212242643 is a wasteful number, since it uses less digits than its factorization.

212242643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130065.

The product of its digits is 4608, while the sum is 26.

The square root of 212242643 is about 14568.5497905591. The cubic root of 212242643 is about 596.5005957021.

Adding to 212242643 its reverse (346242212), we get a palindrome (558484855).

The spelling of 212242643 in words is "two hundred twelve million, two hundred forty-two thousand, six hundred forty-three".