306775225 has 27 divisors (see below), whose sum is σ = 396577389. Its totient is φ = 235401600.

The previous prime is 306775213. The next prime is 306775229. The reversal of 306775225 is 522577603.

The square root of 306775225 is 17515.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 156075049 + 150700176 = 12493^2 + 12276^2 .

It is not a de Polignac number, because 306775225 - 2²³ = 298386617 is a prime.

It is a super-2 number, since 2×306775225² = 188222077347601250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (306775229) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 2714769 + ... + 2714881.

Almost surely, 2^306775225 is an apocalyptic number.

306775225 is the 17515-th square number.

306775225 is the 8758-th centered octagonal number.

It is an amenable number.

306775225 is a deficient number, since it is larger than the sum of its proper divisors (89802164).

306775225 is an equidigital number, since it uses as much as digits as its factorization.

306775225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 37.

The cubic root of 306775225 is about 674.4349912975.

The spelling of 306775225 in words is "three hundred six million, seven hundred seventy-five thousand, two hundred twenty-five".