205231823 has 8 divisors (see below), whose sum is σ = 206725440. Its totient is φ = 203744160.

The previous prime is 205231781. The next prime is 205231841. The reversal of 205231823 is 328132502.

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

It is a cyclic number.

It is not a de Polignac number, because 205231823 - 2¹² = 205227727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205231792 and 205231801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205231853) 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 7 ways as a sum of consecutive naturals, for example, 84713 + ... + 87101.

It is an arithmetic number, because the mean of its divisors is an integer number (25840680).

Almost surely, 2^205231823 is an apocalyptic number.

205231823 is a deficient number, since it is larger than the sum of its proper divisors (1493617).

205231823 is a wasteful number, since it uses less digits than its factorization.

205231823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 205231823 is about 14325.9143861744. The cubic root of 205231823 is about 589.8590326819.

The spelling of 205231823 in words is "two hundred five million, two hundred thirty-one thousand, eight hundred twenty-three".