305520345 has 96 divisors (see below), whose sum is σ = 623960064. Its totient is φ = 136857600.

The previous prime is 305520343. The next prime is 305520373. The reversal of 305520345 is 543025503.

It is not a de Polignac number, because 305520345 - 2¹ = 305520343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (305520343) 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 95 ways as a sum of consecutive naturals, for example, 307800 + ... + 308790.

It is an arithmetic number, because the mean of its divisors is an integer number (6499584).

Almost surely, 2^305520345 is an apocalyptic number.

It is an amenable number.

305520345 is an abundant number, since it is smaller than the sum of its proper divisors (318439719).

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

305520345 is a wasteful number, since it uses less digits than its factorization.

305520345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 305520345 is about 17479.1402820619. The cubic root of 305520345 is about 673.5141307512.

Adding to 305520345 its reverse (543025503), we get a palindrome (848545848).

The spelling of 305520345 in words is "three hundred five million, five hundred twenty thousand, three hundred forty-five".