306520420225 has 6 divisors (see below), whose sum is σ = 380085321110. Its totient is φ = 245216336160.

The previous prime is 306520420211. The next prime is 306520420267. The reversal of 306520420225 is 522024025603.

It can be written as a sum of positive squares in 3 ways, for example, as 44541258304 + 261979161921 = 211048^2 + 511839^2 .

It is not a de Polignac number, because 306520420225 - 2¹⁹ = 306519895937 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6130408380 + ... + 6130408429.

Almost surely, 2^306520420225 is an apocalyptic number.

It is an amenable number.

306520420225 is a deficient number, since it is larger than the sum of its proper divisors (73564900885).

306520420225 is a wasteful number, since it uses less digits than its factorization.

306520420225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260816819 (or 12260816814 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 306520420225 its reverse (522024025603), we get a palindrome (828544445828).

The spelling of 306520420225 in words is "three hundred six billion, five hundred twenty million, four hundred twenty thousand, two hundred twenty-five".