205005553 has 16 divisors (see below), whose sum is σ = 219859200. Its totient is φ = 190794240.

The previous prime is 205005539. The next prime is 205005557. The reversal of 205005553 is 355500502.

It is a cyclic number.

It is not a de Polignac number, because 205005553 - 2²¹ = 202908401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205005557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97473 + ... + 99553.

It is an arithmetic number, because the mean of its divisors is an integer number (13741200).

Almost surely, 2^205005553 is an apocalyptic number.

It is an amenable number.

205005553 is a deficient number, since it is larger than the sum of its proper divisors (14853647).

205005553 is a wasteful number, since it uses less digits than its factorization.

205005553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232.

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 205005553 is about 14318.0149811348. The cubic root of 205005553 is about 589.6421779383.

The spelling of 205005553 in words is "two hundred five million, five thousand, five hundred fifty-three".