211340423 has 8 divisors (see below), whose sum is σ = 249323520. Its totient is φ = 175305240.

The previous prime is 211340407. The next prime is 211340431. The reversal of 211340423 is 324043112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211340423 - 2⁴ = 211340407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211340395 and 211340404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211340443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486743 + ... + 487176.

It is an arithmetic number, because the mean of its divisors is an integer number (31165440).

Almost surely, 2^211340423 is an apocalyptic number.

211340423 is a deficient number, since it is larger than the sum of its proper divisors (37983097).

211340423 is an equidigital number, since it uses as much as digits as its factorization.

211340423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973957.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 211340423 is about 14537.5521667164. The cubic root of 211340423 is about 595.6541758692.

Adding to 211340423 its reverse (324043112), we get a palindrome (535383535).

The spelling of 211340423 in words is "two hundred eleven million, three hundred forty thousand, four hundred twenty-three".