205031113 has 8 divisors (see below), whose sum is σ = 236111040. Its totient is φ = 174398640.

The previous prime is 205031069. The next prime is 205031159. The reversal of 205031113 is 311130502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205031113 - 2⁹ = 205030601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205091113) 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, 110878 + ... + 112711.

It is an arithmetic number, because the mean of its divisors is an integer number (29513880).

Almost surely, 2^205031113 is an apocalyptic number.

It is an amenable number.

205031113 is a deficient number, since it is larger than the sum of its proper divisors (31079927).

205031113 is a wasteful number, since it uses less digits than its factorization.

205031113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223727.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 205031113 is about 14318.9075351439. The cubic root of 205031113 is about 589.6666823603. Note that the first 4 decimals are identical.

Adding to 205031113 its reverse (311130502), we get a palindrome (516161615).

The spelling of 205031113 in words is "two hundred five million, thirty-one thousand, one hundred thirteen".