205412305 has 16 divisors (see below), whose sum is σ = 282305664. Its totient is φ = 140555520.

The previous prime is 205412303. The next prime is 205412321. The reversal of 205412305 is 503214502.

It is not a de Polignac number, because 205412305 - 2¹ = 205412303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205412303) 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, 11209 + ... + 23161.

It is an arithmetic number, because the mean of its divisors is an integer number (17644104).

Almost surely, 2^205412305 is an apocalyptic number.

It is an amenable number.

205412305 is a deficient number, since it is larger than the sum of its proper divisors (76893359).

205412305 is a wasteful number, since it uses less digits than its factorization.

205412305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12456.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 205412305 is about 14332.2121460715. The cubic root of 205412305 is about 590.0318904528.

Adding to 205412305 its reverse (503214502), we get a palindrome (708626807).

The spelling of 205412305 in words is "two hundred five million, four hundred twelve thousand, three hundred five".