205505102 has 16 divisors (see below), whose sum is σ = 353980800. Its totient is φ = 88494840.

The previous prime is 205505101. The next prime is 205505137. The reversal of 205505102 is 201505502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205505101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245402 + ... + 246237.

It is an arithmetic number, because the mean of its divisors is an integer number (22123800).

Almost surely, 2^205505102 is an apocalyptic number.

205505102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

205505102 is a deficient number, since it is larger than the sum of its proper divisors (148475698).

205505102 is a wasteful number, since it uses less digits than its factorization.

205505102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491671.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 205505102 is about 14335.4491384121. The cubic root of 205505102 is about 590.1207279518.

It can be divided in two parts, 20550 and 5102, that added together give a palindrome (25652).

The spelling of 205505102 in words is "two hundred five million, five hundred five thousand, one hundred two".