211423023009 has 48 divisors (see below), whose sum is σ = 342408393600. Its totient is φ = 124579918080.

The previous prime is 211423022999. The next prime is 211423023029. The reversal of 211423023009 is 900320324112.

It is a happy number.

211423023009 is a `hidden beast` number, since 2 + 1 + 1 + 423 + 0 + 230 + 0 + 9 = 666.

It is not a de Polignac number, because 211423023009 - 2⁹ = 211423022497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211423023029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5103909 + ... + 5145165.

It is an arithmetic number, because the mean of its divisors is an integer number (7133508200).

Almost surely, 2^211423023009 is an apocalyptic number.

It is an amenable number.

211423023009 is a deficient number, since it is larger than the sum of its proper divisors (130985370591).

211423023009 is a wasteful number, since it uses less digits than its factorization.

211423023009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42710 (or 42707 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 211423023009 in words is "two hundred eleven billion, four hundred twenty-three million, twenty-three thousand, nine".