320557441 has 8 divisors (see below), whose sum is σ = 324525960. Its totient is φ = 316597248.

The previous prime is 320557429. The next prime is 320557451. The reversal of 320557441 is 144755023.

It can be written as a sum of positive squares in 4 ways, for example, as 49000000 + 271557441 = 7000^2 + 16479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320557441 - 2⁷ = 320557313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320557411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114045 + ... + 116821.

It is an arithmetic number, because the mean of its divisors is an integer number (40565745).

Almost surely, 2^320557441 is an apocalyptic number.

It is an amenable number.

320557441 is a deficient number, since it is larger than the sum of its proper divisors (3968519).

320557441 is a wasteful number, since it uses less digits than its factorization.

320557441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 320557441 is about 17904.1179900044. The cubic root of 320557441 is about 684.3873193949.

The spelling of 320557441 in words is "three hundred twenty million, five hundred fifty-seven thousand, four hundred forty-one".