213442343 has 2 divisors, whose sum is σ = 213442344. Its totient is φ = 213442342.

The previous prime is 213442319. The next prime is 213442357. The reversal of 213442343 is 343244312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213442343 - 2¹⁴ = 213425959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213442363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106721171 + 106721172.

It is an arithmetic number, because the mean of its divisors is an integer number (106721172).

Almost surely, 2^213442343 is an apocalyptic number.

213442343 is a deficient number, since it is larger than the sum of its proper divisors (1).

213442343 is an equidigital number, since it uses as much as digits as its factorization.

213442343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 26.

The square root of 213442343 is about 14609.6660810574. Note that the first 3 decimals coincide. The cubic root of 213442343 is about 597.6223898021.

Adding to 213442343 its reverse (343244312), we get a palindrome (556686655).

The spelling of 213442343 in words is "two hundred thirteen million, four hundred forty-two thousand, three hundred forty-three".