213442043 has 2 divisors, whose sum is σ = 213442044. Its totient is φ = 213442042.

The previous prime is 213442007. The next prime is 213442049. The reversal of 213442043 is 340244312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213442043 - 2⁶ = 213441979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213442049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106721021 + 106721022.

It is an arithmetic number, because the mean of its divisors is an integer number (106721022).

Almost surely, 2^213442043 is an apocalyptic number.

213442043 is a deficient number, since it is larger than the sum of its proper divisors (1).

213442043 is an equidigital number, since it uses as much as digits as its factorization.

213442043 is an odious number, because the sum of its binary digits is odd.

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

The square root of 213442043 is about 14609.6558138787. The cubic root of 213442043 is about 597.6221098095.

Adding to 213442043 its reverse (340244312), we get a palindrome (553686355).

The spelling of 213442043 in words is "two hundred thirteen million, four hundred forty-two thousand, forty-three".