211234423 has 2 divisors, whose sum is σ = 211234424. Its totient is φ = 211234422.

The previous prime is 211234379. The next prime is 211234453. The reversal of 211234423 is 324432112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211234423 - 2¹³ = 211226231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211234394 and 211234403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211234453) 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, 105617211 + 105617212.

It is an arithmetic number, because the mean of its divisors is an integer number (105617212).

Almost surely, 2^211234423 is an apocalyptic number.

211234423 is a deficient number, since it is larger than the sum of its proper divisors (1).

211234423 is an equidigital number, since it uses as much as digits as its factorization.

211234423 is an odious number, because the sum of its binary digits is odd.

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

The square root of 211234423 is about 14533.9059787794. The cubic root of 211234423 is about 595.5545736875.

Adding to 211234423 its reverse (324432112), we get a palindrome (535666535).

The spelling of 211234423 in words is "two hundred eleven million, two hundred thirty-four thousand, four hundred twenty-three".