205345131 has 16 divisors (see below), whose sum is σ = 278132256. Its totient is φ = 134735616.

The previous prime is 205345121. The next prime is 205345163. The reversal of 205345131 is 131543502.

It is not a de Polignac number, because 205345131 - 2⁵ = 205345099 is a prime.

It is a super-2 number, since 2×205345131² = 84333245650814322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205345121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168681 + ... + 169893.

It is an arithmetic number, because the mean of its divisors is an integer number (17383266).

Almost surely, 2^205345131 is an apocalyptic number.

205345131 is a deficient number, since it is larger than the sum of its proper divisors (72787125).

205345131 is a wasteful number, since it uses less digits than its factorization.

205345131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 205345131 is about 14329.8684920693. The cubic root of 205345131 is about 589.9675659658.

Adding to 205345131 its reverse (131543502), we get a palindrome (336888633).

The spelling of 205345131 in words is "two hundred five million, three hundred forty-five thousand, one hundred thirty-one".