211440341423 has 4 divisors (see below), whose sum is σ = 211881762240. Its totient is φ = 210998920608.

The previous prime is 211440341369. The next prime is 211440341471. The reversal of 211440341423 is 324143044112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211440341423 - 2²⁶ = 211373232559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211440346423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220709690 + ... + 220710647.

It is an arithmetic number, because the mean of its divisors is an integer number (52970440560).

Almost surely, 2^211440341423 is an apocalyptic number.

211440341423 is a deficient number, since it is larger than the sum of its proper divisors (441420817).

211440341423 is an equidigital number, since it uses as much as digits as its factorization.

211440341423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441420816.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 211440341423 its reverse (324143044112), we get a palindrome (535583385535).

The spelling of 211440341423 in words is "two hundred eleven billion, four hundred forty million, three hundred forty-one thousand, four hundred twenty-three".