205531102 has 16 divisors (see below), whose sum is σ = 358312320. Its totient is φ = 86591448.

The previous prime is 205531087. The next prime is 205531121. The reversal of 205531102 is 201135502.

It is a self number, because there is not a number n which added to its sum of digits gives 205531102.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 123588 + ... + 125239.

It is an arithmetic number, because the mean of its divisors is an integer number (22394520).

Almost surely, 2^205531102 is an apocalyptic number.

205531102 is a deficient number, since it is larger than the sum of its proper divisors (152781218).

205531102 is a wasteful number, since it uses less digits than its factorization.

205531102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248895.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 205531102 is about 14336.3559526122. The cubic root of 205531102 is about 590.1456137766.

Adding to 205531102 its reverse (201135502), we get a palindrome (406666604).

The spelling of 205531102 in words is "two hundred five million, five hundred thirty-one thousand, one hundred two".