205243423 has 8 divisors (see below), whose sum is σ = 255888000. Its totient is φ = 159929880.

The previous prime is 205243393. The next prime is 205243481. The reversal of 205243423 is 324342502.

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

It is not a de Polignac number, because 205243423 - 2⁵ = 205243391 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 (205243483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332673 + ... + 1332826.

It is an arithmetic number, because the mean of its divisors is an integer number (31986000).

Almost surely, 2^205243423 is an apocalyptic number.

205243423 is a deficient number, since it is larger than the sum of its proper divisors (50644577).

205243423 is a wasteful number, since it uses less digits than its factorization.

205243423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665517.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 205243423 is about 14326.3192411729. The cubic root of 205243423 is about 589.8701457016.

Adding to 205243423 its reverse (324342502), we get a palindrome (529585925).

The spelling of 205243423 in words is "two hundred five million, two hundred forty-three thousand, four hundred twenty-three".