205501116 has 12 divisors (see below), whose sum is σ = 479502632. Its totient is φ = 68500368.

The previous prime is 205501091. The next prime is 205501133. The reversal of 205501116 is 611105502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 205501092 and 205501101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8562535 + ... + 8562558.

Almost surely, 2^205501116 is an apocalyptic number.

It is an amenable number.

205501116 is an abundant number, since it is smaller than the sum of its proper divisors (274001516).

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

205501116 is a wasteful number, since it uses less digits than its factorization.

205501116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17125100 (or 17125098 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 205501116 is about 14335.3101117485. The cubic root of 205501116 is about 590.1169125779.

Adding to 205501116 its reverse (611105502), we get a palindrome (816606618).

The spelling of 205501116 in words is "two hundred five million, five hundred one thousand, one hundred sixteen".