205520072 has 32 divisors (see below), whose sum is σ = 408693600. Its totient is φ = 96555264.

The previous prime is 205520059. The next prime is 205520083. The reversal of 205520072 is 270025502.

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 7 ways as a sum of consecutive naturals, for example, 137843 + ... + 139325.

It is an arithmetic number, because the mean of its divisors is an integer number (12771675).

Almost surely, 2^205520072 is an apocalyptic number.

It is an amenable number.

205520072 is a deficient number, since it is larger than the sum of its proper divisors (203173528).

205520072 is a wasteful number, since it uses less digits than its factorization.

205520072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525 (or 2521 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 205520072 is about 14335.9712611319. The cubic root of 205520072 is about 590.1350567004.

Adding to 205520072 its reverse (270025502), we get a palindrome (475545574).

The spelling of 205520072 in words is "two hundred five million, five hundred twenty thousand, seventy-two".