205553601 has 12 divisors (see below), whose sum is σ = 323902800. Its totient is φ = 124577880.

The previous prime is 205553587. The next prime is 205553603. The reversal of 205553601 is 106355502.

205553601 is a `hidden beast` number, since 2 + 0 + 5 + 5 + 53 + 601 = 666.

It is not a de Polignac number, because 205553601 - 2¹³ = 205545409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205553603) 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 11 ways as a sum of consecutive naturals, for example, 1038051 + ... + 1038248.

It is an arithmetic number, because the mean of its divisors is an integer number (26991900).

Almost surely, 2^205553601 is an apocalyptic number.

It is an amenable number.

205553601 is a deficient number, since it is larger than the sum of its proper divisors (118349199).

205553601 is a wasteful number, since it uses less digits than its factorization.

205553601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076316 (or 2076313 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 205553601 is about 14337.1406145019. The cubic root of 205553601 is about 590.1671469356.

The spelling of 205553601 in words is "two hundred five million, five hundred fifty-three thousand, six hundred one".