211434140423 has 4 divisors (see below), whose sum is σ = 230655425928. Its totient is φ = 192212854920.

The previous prime is 211434140329. The next prime is 211434140471. The reversal of 211434140423 is 324041434112.

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 211434140423 - 2⁸ = 211434140167 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 (211434140623) 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, 9610642736 + ... + 9610642757.

It is an arithmetic number, because the mean of its divisors is an integer number (57663856482).

Almost surely, 2^211434140423 is an apocalyptic number.

211434140423 is a deficient number, since it is larger than the sum of its proper divisors (19221285505).

211434140423 is a wasteful number, since it uses less digits than its factorization.

211434140423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19221285504.

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

Adding to 211434140423 its reverse (324041434112), we get a palindrome (535475574535).

The spelling of 211434140423 in words is "two hundred eleven billion, four hundred thirty-four million, one hundred forty thousand, four hundred twenty-three".