205343140 has 12 divisors (see below), whose sum is σ = 431220636. Its totient is φ = 82137248.

The previous prime is 205343137. The next prime is 205343143. The reversal of 205343140 is 41343502.

It is an interprime number because it is at equal distance from previous prime (205343137) and next prime (205343143).

It can be written as a sum of positive squares in 2 ways, for example, as 64256256 + 141086884 = 8016^2 + 11878^2 .

It is not an unprimeable number, because it can be changed into a prime (205343143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5133559 + ... + 5133598.

It is an arithmetic number, because the mean of its divisors is an integer number (35935053).

Almost surely, 2^205343140 is an apocalyptic number.

205343140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205343140 is an abundant number, since it is smaller than the sum of its proper divisors (225877496).

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

205343140 is a wasteful number, since it uses less digits than its factorization.

205343140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10267166 (or 10267164 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 205343140 is about 14329.7990216192. The cubic root of 205343140 is about 589.9656592097.

Adding to 205343140 its reverse (41343502), we get a palindrome (246686642).

The spelling of 205343140 in words is "two hundred five million, three hundred forty-three thousand, one hundred forty".