320604481 has 4 divisors (see below), whose sum is σ = 320650452. Its totient is φ = 320558512.

The previous prime is 320604457. The next prime is 320604491. The reversal of 320604481 is 184406023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184406023 = 3023 ⋅61001.

It can be written as a sum of positive squares in 2 ways, for example, as 96353856 + 224250625 = 9816^2 + 14975^2 .

It is a cyclic number.

It is not a de Polignac number, because 320604481 - 2¹¹ = 320602433 is a prime.

It is a super-2 number, since 2×320604481² = 205574466474558722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320604451) 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, 10126 + ... + 27271.

It is an arithmetic number, because the mean of its divisors is an integer number (80162613).

Almost surely, 2^320604481 is an apocalyptic number.

It is an amenable number.

320604481 is a deficient number, since it is larger than the sum of its proper divisors (45971).

320604481 is an equidigital number, since it uses as much as digits as its factorization.

320604481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45970.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 320604481 is about 17905.4316060798. The cubic root of 320604481 is about 684.4207944197.

The spelling of 320604481 in words is "three hundred twenty million, six hundred four thousand, four hundred eighty-one".