211131423 has 12 divisors (see below), whose sum is σ = 305206408. Its totient is φ = 140644080.

The previous prime is 211131413. The next prime is 211131451. The reversal of 211131423 is 324131112.

211131423 is a `hidden beast` number, since 211 + 1 + 31 + 423 = 666.

It is not a de Polignac number, because 211131423 - 2²⁴ = 194354207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211131396 and 211131405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3936 + ... + 20922.

Almost surely, 2^211131423 is an apocalyptic number.

211131423 is a deficient number, since it is larger than the sum of its proper divisors (94074985).

211131423 is a wasteful number, since it uses less digits than its factorization.

211131423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18374 (or 18371 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 211131423 is about 14530.3621083578. The cubic root of 211131423 is about 595.4577585105.

Adding to 211131423 its reverse (324131112), we get a palindrome (535262535).

The spelling of 211131423 in words is "two hundred eleven million, one hundred thirty-one thousand, four hundred twenty-three".