205031101 has 8 divisors (see below), whose sum is σ = 236827584. Its totient is φ = 175427520.

The previous prime is 205031069. The next prime is 205031159. The reversal of 205031101 is 101130502.

205031101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 205031101 - 2⁵ = 205031069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205031161) 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, 548025 + ... + 548398.

It is an arithmetic number, because the mean of its divisors is an integer number (29603448).

Almost surely, 2^205031101 is an apocalyptic number.

It is an amenable number.

205031101 is a deficient number, since it is larger than the sum of its proper divisors (31796483).

205031101 is a wasteful number, since it uses less digits than its factorization.

205031101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096451.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 205031101 is about 14318.9071161175. The cubic root of 205031101 is about 589.6666708564. Note that the first 4 decimals are identical.

Adding to 205031101 its reverse (101130502), we get a palindrome (306161603).

The spelling of 205031101 in words is "two hundred five million, thirty-one thousand, one hundred one".