205031320 has 32 divisors (see below), whose sum is σ = 496807920. Its totient is φ = 75703680.

The previous prime is 205031311. The next prime is 205031327. The reversal of 205031320 is 23130502.

205031320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 205031294 and 205031303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205031327) 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, 196626 + ... + 197665.

Almost surely, 2^205031320 is an apocalyptic number.

205031320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205031320 is an abundant number, since it is smaller than the sum of its proper divisors (291776600).

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

205031320 is a wasteful number, since it uses less digits than its factorization.

205031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394315 (or 394311 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 205031320 is about 14318.9147633471. The cubic root of 205031320 is about 589.6668808033. Note that the first 3 decimals are identical.

Adding to 205031320 its reverse (23130502), we get a palindrome (228161822).

The spelling of 205031320 in words is "two hundred five million, thirty-one thousand, three hundred twenty".