305725225 has 27 divisors (see below), whose sum is σ = 412035663. Its totient is φ = 224927040.

The previous prime is 305725201. The next prime is 305725237. The reversal of 305725225 is 522527503.

The square root of 305725225 is 17485.

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

It can be written as a sum of positive squares in 13 ways, for example, as 283484569 + 22240656 = 16837^2 + 4716^2 .

It is not a de Polignac number, because 305725225 - 2⁷ = 305725097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1136391 + ... + 1136659.

Almost surely, 2^305725225 is an apocalyptic number.

305725225 is the 17485-th square number.

305725225 is the 8743-rd centered octagonal number.

It is an amenable number.

305725225 is a deficient number, since it is larger than the sum of its proper divisors (106310438).

305725225 is an equidigital number, since it uses as much as digits as its factorization.

305725225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The cubic root of 305725225 is about 673.6646485414.

It can be divided in two parts, 3057 and 25225, that added together give a palindrome (28282).

The spelling of 305725225 in words is "three hundred five million, seven hundred twenty-five thousand, two hundred twenty-five".