205412307 has 16 divisors (see below), whose sum is σ = 283716000. Its totient is φ = 132038144.

The previous prime is 205412303. The next prime is 205412321. The reversal of 205412307 is 703214502.

It is a cyclic number.

It is not a de Polignac number, because 205412307 - 2² = 205412303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205412303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95419 + ... + 97547.

It is an arithmetic number, because the mean of its divisors is an integer number (17732250).

Almost surely, 2^205412307 is an apocalyptic number.

205412307 is a deficient number, since it is larger than the sum of its proper divisors (78303693).

205412307 is a wasteful number, since it uses less digits than its factorization.

205412307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 205412307 is about 14332.2122158444. The cubic root of 205412307 is about 590.0318923678.

Adding to 205412307 its reverse (703214502), we get a palindrome (908626809).

The spelling of 205412307 in words is "two hundred five million, four hundred twelve thousand, three hundred seven".