205229823 has 4 divisors (see below), whose sum is σ = 273639768. Its totient is φ = 136819880.

The previous prime is 205229819. The next prime is 205229863. The reversal of 205229823 is 328922502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205229823 - 2² = 205229819 is a prime.

It is a super-2 number, since 2×205229823² = 84238560497222658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205229863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34204968 + ... + 34204973.

It is an arithmetic number, because the mean of its divisors is an integer number (68409942).

Almost surely, 2^205229823 is an apocalyptic number.

205229823 is a deficient number, since it is larger than the sum of its proper divisors (68409945).

205229823 is an equidigital number, since it uses as much as digits as its factorization.

205229823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68409944.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 205229823 is about 14325.8445824321. The cubic root of 205229823 is about 589.8571166017.

The spelling of 205229823 in words is "two hundred five million, two hundred twenty-nine thousand, eight hundred twenty-three".