205800154 has 8 divisors (see below), whose sum is σ = 352800288. Its totient is φ = 88200060.

The previous prime is 205800151. The next prime is 205800209. The reversal of 205800154 is 451008502.

205800154 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (205800151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7349992 + ... + 7350019.

It is an arithmetic number, because the mean of its divisors is an integer number (44100036).

Almost surely, 2^205800154 is an apocalyptic number.

205800154 is a deficient number, since it is larger than the sum of its proper divisors (147000134).

205800154 is a wasteful number, since it uses less digits than its factorization.

205800154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14700020.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 205800154 is about 14345.7364397928. The cubic root of 205800154 is about 590.4030129772.

Adding to 205800154 its reverse (451008502), we get a palindrome (656808656).

The spelling of 205800154 in words is "two hundred five million, eight hundred thousand, one hundred fifty-four".