205401105 has 48 divisors (see below), whose sum is σ = 438197760. Its totient is φ = 86673024.

The previous prime is 205401061. The next prime is 205401107. The reversal of 205401105 is 501104502.

205401105 is a `hidden beast` number, since 20 + 540 + 1 + 105 = 666.

It is not a de Polignac number, because 205401105 - 2⁶ = 205401041 is a prime.

It is a super-2 number, since 2×205401105² = 84379227870442050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205401107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20985 + ... + 29174.

It is an arithmetic number, because the mean of its divisors is an integer number (9129120).

Almost surely, 2^205401105 is an apocalyptic number.

It is an amenable number.

205401105 is an abundant number, since it is smaller than the sum of its proper divisors (232796655).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205401105 is a wasteful number, since it uses less digits than its factorization.

205401105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50190 (or 50187 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 205401105 is about 14331.8214125072. The cubic root of 205401105 is about 590.0211665297.

Adding to 205401105 its reverse (501104502), we get a palindrome (706505607).

The spelling of 205401105 in words is "two hundred five million, four hundred one thousand, one hundred five".