205030306 has 8 divisors (see below), whose sum is σ = 331202844. Its totient is φ = 94629360.

The previous prime is 205030277. The next prime is 205030313. The reversal of 205030306 is 603030502.

It can be written as a sum of positive squares in 2 ways, for example, as 203490225 + 1540081 = 14265^2 + 1241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3942865 + ... + 3942916.

Almost surely, 2^205030306 is an apocalyptic number.

205030306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

205030306 is a deficient number, since it is larger than the sum of its proper divisors (126172538).

205030306 is a wasteful number, since it uses less digits than its factorization.

205030306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885796.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 205030306 is about 14318.8793555920. The cubic root of 205030306 is about 589.6659087190.

Adding to 205030306 its reverse (603030502), we get a palindrome (808060808).

The spelling of 205030306 in words is "two hundred five million, thirty thousand, three hundred six".