205116553 has 8 divisors (see below), whose sum is σ = 220939776. Its totient is φ = 189868800.

The previous prime is 205116551. The next prime is 205116559. The reversal of 205116553 is 355611502.

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

It is not a de Polignac number, because 205116553 - 2¹ = 205116551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205116551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143128 + ... + 144553.

It is an arithmetic number, because the mean of its divisors is an integer number (27617472).

Almost surely, 2^205116553 is an apocalyptic number.

205116553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

205116553 is a deficient number, since it is larger than the sum of its proper divisors (15823223).

205116553 is a wasteful number, since it uses less digits than its factorization.

205116553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287735.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 205116553 is about 14321.8906922236. The cubic root of 205116553 is about 589.7485790767.

The spelling of 205116553 in words is "two hundred five million, one hundred sixteen thousand, five hundred fifty-three".