205131355 has 48 divisors (see below), whose sum is σ = 301203360. Its totient is φ = 132787200.

The previous prime is 205131343. The next prime is 205131361. The reversal of 205131355 is 553131502.

205131355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205131355 - 2¹⁵ = 205098587 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 269175 + ... + 269935.

It is an arithmetic number, because the mean of its divisors is an integer number (6275070).

Almost surely, 2^205131355 is an apocalyptic number.

205131355 is a deficient number, since it is larger than the sum of its proper divisors (96072005).

205131355 is a wasteful number, since it uses less digits than its factorization.

205131355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 205131355 is about 14322.4074442811. The cubic root of 205131355 is about 589.7627649113.

Adding to 205131355 its reverse (553131502), we get a palindrome (758262857).

The spelling of 205131355 in words is "two hundred five million, one hundred thirty-one thousand, three hundred fifty-five".