205500154 has 8 divisors (see below), whose sum is σ = 308367540. Its totient is φ = 102710976.

The previous prime is 205500103. The next prime is 205500157. The reversal of 205500154 is 451005502.

It can be written as a sum of positive squares in 2 ways, for example, as 190854225 + 14645929 = 13815^2 + 3827^2 .

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 (205500157) 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, 12469 + ... + 23800.

Almost surely, 2^205500154 is an apocalyptic number.

205500154 is a deficient number, since it is larger than the sum of its proper divisors (102867386).

205500154 is a wasteful number, since it uses less digits than its factorization.

205500154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39104.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 205500154 is about 14335.2765581973. The cubic root of 205500154 is about 590.1159917502.

Adding to 205500154 its reverse (451005502), we get a palindrome (656505656).

The spelling of 205500154 in words is "two hundred five million, five hundred thousand, one hundred fifty-four".