205611423 has 8 divisors (see below), whose sum is σ = 280524288. Its totient is φ = 133886424.

The previous prime is 205611397. The next prime is 205611431. The reversal of 205611423 is 324116502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205611423 - 2⁵ = 205611391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205611393 and 205611402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205611463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796815 + ... + 797072.

It is an arithmetic number, because the mean of its divisors is an integer number (35065536).

Almost surely, 2^205611423 is an apocalyptic number.

205611423 is a deficient number, since it is larger than the sum of its proper divisors (74912865).

205611423 is a wasteful number, since it uses less digits than its factorization.

205611423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593933.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 205611423 is about 14339.1569835887. The cubic root of 205611423 is about 590.2224795356. Note that the first 3 decimals are identical.

Adding to 205611423 its reverse (324116502), we get a palindrome (529727925).

The spelling of 205611423 in words is "two hundred five million, six hundred eleven thousand, four hundred twenty-three".