212421343 has 4 divisors (see below), whose sum is σ = 214094080. Its totient is φ = 210748608.

The previous prime is 212421323. The next prime is 212421359. The reversal of 212421343 is 343124212.

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 212421343 - 2¹³ = 212413151 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 (212421323) 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, 836178 + ... + 836431.

It is an arithmetic number, because the mean of its divisors is an integer number (53523520).

Almost surely, 2^212421343 is an apocalyptic number.

212421343 is a deficient number, since it is larger than the sum of its proper divisors (1672737).

212421343 is a wasteful number, since it uses less digits than its factorization.

212421343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672736.

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

The square root of 212421343 is about 14574.6815745662. The cubic root of 212421343 is about 596.6679587931.

Adding to 212421343 its reverse (343124212), we get a palindrome (555545555).

The spelling of 212421343 in words is "two hundred twelve million, four hundred twenty-one thousand, three hundred forty-three".