213642323 has 2 divisors, whose sum is σ = 213642324. Its totient is φ = 213642322.

The previous prime is 213642283. The next prime is 213642343. The reversal of 213642323 is 323246312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213642323 - 2⁶ = 213642259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213642292 and 213642301.

It is not a weakly prime, because it can be changed into another prime (213642343) 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, 106821161 + 106821162.

It is an arithmetic number, because the mean of its divisors is an integer number (106821162).

Almost surely, 2^213642323 is an apocalyptic number.

213642323 is a deficient number, since it is larger than the sum of its proper divisors (1).

213642323 is an equidigital number, since it uses as much as digits as its factorization.

213642323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 26.

The square root of 213642323 is about 14616.5085776323. The cubic root of 213642323 is about 597.8089744919.

Adding to 213642323 its reverse (323246312), we get a palindrome (536888635).

The spelling of 213642323 in words is "two hundred thirteen million, six hundred forty-two thousand, three hundred twenty-three".