306225481 has 4 divisors (see below), whose sum is σ = 306274500. Its totient is φ = 306176464.

The previous prime is 306225463. The next prime is 306225599. The reversal of 306225481 is 184522603.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123543225 + 182682256 = 11115^2 + 13516^2 .

It is a cyclic number.

It is not a de Polignac number, because 306225481 - 2⁵ = 306225449 is a prime.

It is a super-2 number, since 2×306225481² = 187548090427362722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306225401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13486 + ... + 28183.

It is an arithmetic number, because the mean of its divisors is an integer number (76568625).

Almost surely, 2^306225481 is an apocalyptic number.

It is an amenable number.

306225481 is a deficient number, since it is larger than the sum of its proper divisors (49019).

306225481 is an equidigital number, since it uses as much as digits as its factorization.

306225481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49018.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 306225481 is about 17499.2994431206. The cubic root of 306225481 is about 674.0318858610.

The spelling of 306225481 in words is "three hundred six million, two hundred twenty-five thousand, four hundred eighty-one".