213212443 has 2 divisors, whose sum is σ = 213212444. Its totient is φ = 213212442.

The previous prime is 213212431. The next prime is 213212473. The reversal of 213212443 is 344212312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213212443 - 2⁵ = 213212411 is a prime.

It is not a weakly prime, because it can be changed into another prime (213212473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106606221 + 106606222.

It is an arithmetic number, because the mean of its divisors is an integer number (106606222).

Almost surely, 2^213212443 is an apocalyptic number.

213212443 is a deficient number, since it is larger than the sum of its proper divisors (1).

213212443 is an equidigital number, since it uses as much as digits as its factorization.

213212443 is an evil number, because the sum of its binary digits is even.

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

The square root of 213212443 is about 14601.7958826988. The cubic root of 213212443 is about 597.4077451911.

Adding to 213212443 its reverse (344212312), we get a palindrome (557424755).

The spelling of 213212443 in words is "two hundred thirteen million, two hundred twelve thousand, four hundred forty-three".