212404343 has 4 divisors (see below), whose sum is σ = 219256128. Its totient is φ = 205552560.

The previous prime is 212404303. The next prime is 212404349. The reversal of 212404343 is 343404212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212404343 is a prime.

It is a super-4 number, since 4×212404343⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212404349) 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, 3425846 + ... + 3425907.

It is an arithmetic number, because the mean of its divisors is an integer number (54814032).

Almost surely, 2^212404343 is an apocalyptic number.

212404343 is a deficient number, since it is larger than the sum of its proper divisors (6851785).

212404343 is an equidigital number, since it uses as much as digits as its factorization.

212404343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6851784.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 212404343 is about 14574.0983597614. The cubic root of 212404343 is about 596.6520413312.

Adding to 212404343 its reverse (343404212), we get a palindrome (555808555).

The spelling of 212404343 in words is "two hundred twelve million, four hundred four thousand, three hundred forty-three".