320052455521 has 4 divisors (see below), whose sum is σ = 320072706052. Its totient is φ = 320032204992.

The previous prime is 320052455497. The next prime is 320052455621. The reversal of 320052455521 is 125554250023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125554250023 = 17 ⋅7385544119.

It can be written as a sum of positive squares in 2 ways, for example, as 205462758400 + 114589697121 = 453280^2 + 338511^2 .

It is a cyclic number.

It is not a de Polignac number, because 320052455521 - 2¹³ = 320052447329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320052455321) 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, 10101540 + ... + 10133173.

It is an arithmetic number, because the mean of its divisors is an integer number (80018176513).

Almost surely, 2^320052455521 is an apocalyptic number.

It is an amenable number.

320052455521 is a deficient number, since it is larger than the sum of its proper divisors (20250531).

320052455521 is a wasteful number, since it uses less digits than its factorization.

320052455521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20250530.

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 320052455521 in words is "three hundred twenty billion, fifty-two million, four hundred fifty-five thousand, five hundred twenty-one".