326922561 has 75 divisors (see below), whose sum is σ = 583960883. Its totient is φ = 182256480.

The previous prime is 326922527. The next prime is 326922581. The reversal of 326922561 is 165229623.

The square root of 326922561 is 18081.

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

326922561 is a `hidden beast` number, since 3 + 2 + 6 + 92 + 2 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15752961 + 311169600 = 3969^2 + 17640^2 .

It is not a de Polignac number, because 326922561 - 2⁷ = 326922433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (326922521) by changing a digit.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 7973701 + ... + 7973741.

Almost surely, 2^326922561 is an apocalyptic number.

326922561 is the 18081-st square number.

326922561 is the 9041-st centered octagonal number.

It is an amenable number.

326922561 is a deficient number, since it is larger than the sum of its proper divisors (257038322).

326922561 is an frugal number, since it uses more digits than its factorization.

326922561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 51 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The cubic root of 326922561 is about 688.8874888870.

Multiplying 326922561 by its sum of digits (36), we get a square (11769212196 = 108486²).

It can be divided in two parts, 32692 and 2561, that added together give a palindrome (35253).

The spelling of 326922561 in words is "three hundred twenty-six million, nine hundred twenty-two thousand, five hundred sixty-one".