213312443 has 2 divisors, whose sum is σ = 213312444. Its totient is φ = 213312442.

The previous prime is 213312431. The next prime is 213312469. The reversal of 213312443 is 344213312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213312443 - 2¹⁰ = 213311419 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213312493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106656221 + 106656222.

It is an arithmetic number, because the mean of its divisors is an integer number (106656222).

Almost surely, 2^213312443 is an apocalyptic number.

213312443 is a deficient number, since it is larger than the sum of its proper divisors (1).

213312443 is an equidigital number, since it uses as much as digits as its factorization.

213312443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 213312443 is about 14605.2197176215. The cubic root of 213312443 is about 597.5011284795.

Adding to 213312443 its reverse (344213312), we get a palindrome (557525755).

The spelling of 213312443 in words is "two hundred thirteen million, three hundred twelve thousand, four hundred forty-three".