320947225 has 9 divisors (see below), whose sum is σ = 398085663. Its totient is φ = 256686120.

The previous prime is 320947153. The next prime is 320947271. The reversal of 320947225 is 522749023.

It is a happy number.

The square root of 320947225 is 17915.

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

It can be written as a sum of positive squares in only one way, i.e., 115541001 + 205406224 = 10749^2 + 14332^2 .

It is not a de Polignac number, because 320947225 - 2²¹ = 318850073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 87784 + ... + 91366.

Almost surely, 2^320947225 is an apocalyptic number.

320947225 is the 17915-th square number.

320947225 is the 8958-th centered octagonal number.

It is an amenable number.

320947225 is a deficient number, since it is larger than the sum of its proper divisors (77138438).

320947225 is an frugal number, since it uses more digits than its factorization.

320947225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7176 (or 3588 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The cubic root of 320947225 is about 684.6646021754.

The spelling of 320947225 in words is "three hundred twenty million, nine hundred forty-seven thousand, two hundred twenty-five".