211434423 has 36 divisors (see below), whose sum is σ = 313736808. Its totient is φ = 126621440.

The previous prime is 211434407. The next prime is 211434439. The reversal of 211434423 is 324434112.

It is an interprime number because it is at equal distance from previous prime (211434407) and next prime (211434439).

It is not a de Polignac number, because 211434423 - 2⁴ = 211434407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211434393 and 211434402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211434463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 458413 + ... + 458873.

Almost surely, 2^211434423 is an apocalyptic number.

211434423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

211434423 is a deficient number, since it is larger than the sum of its proper divisors (102302385).

211434423 is a wasteful number, since it uses less digits than its factorization.

211434423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 504 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 211434423 is about 14540.7848137575. The cubic root of 211434423 is about 595.7424744737.

Adding to 211434423 its reverse (324434112), we get a palindrome (535868535).

The spelling of 211434423 in words is "two hundred eleven million, four hundred thirty-four thousand, four hundred twenty-three".