320452561 has 24 divisors (see below), whose sum is σ = 380733696. Its totient is φ = 267359040.

The previous prime is 320452547. The next prime is 320452579. The reversal of 320452561 is 165254023.

It is not a de Polignac number, because 320452561 - 2¹⁵ = 320419793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320452501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 414171 + ... + 414943.

It is an arithmetic number, because the mean of its divisors is an integer number (15863904).

Almost surely, 2^320452561 is an apocalyptic number.

It is an amenable number.

320452561 is a deficient number, since it is larger than the sum of its proper divisors (60281135).

320452561 is a wasteful number, since it uses less digits than its factorization.

320452561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 320452561 is about 17901.1888152715. The cubic root of 320452561 is about 684.3126719605.

The spelling of 320452561 in words is "three hundred twenty million, four hundred fifty-two thousand, five hundred sixty-one".