205520012 has 12 divisors (see below), whose sum is σ = 359763096. Its totient is φ = 102730560.

The previous prime is 205519997. The next prime is 205520027. The reversal of 205520012 is 210025502.

It is an interprime number because it is at equal distance from previous prime (205519997) and next prime (205520027).

It is a super-4 number, since 4×205520012⁴ (a number of 34 digits) contains 4444 as substring.

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, 18212 + ... + 27252.

It is an arithmetic number, because the mean of its divisors is an integer number (29980258).

Almost surely, 2^205520012 is an apocalyptic number.

It is an amenable number.

205520012 is a deficient number, since it is larger than the sum of its proper divisors (154243084).

205520012 is a wasteful number, since it uses less digits than its factorization.

205520012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14728 (or 14726 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 205520012 is about 14335.9691684936. The cubic root of 205520012 is about 590.1349992719.

Adding to 205520012 its reverse (210025502), we get a palindrome (415545514).

The spelling of 205520012 in words is "two hundred five million, five hundred twenty thousand, twelve".