323326561 has 4 divisors (see below), whose sum is σ = 326187972. Its totient is φ = 320465152.

The previous prime is 323326543. The next prime is 323326607. The reversal of 323326561 is 165623323.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28998225 + 294328336 = 5385^2 + 17156^2 .

It is a cyclic number.

It is not a de Polignac number, because 323326561 - 2¹⁷ = 323195489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (323336561) 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, 1430536 + ... + 1430761.

It is an arithmetic number, because the mean of its divisors is an integer number (81546993).

Almost surely, 2^323326561 is an apocalyptic number.

It is an amenable number.

323326561 is a deficient number, since it is larger than the sum of its proper divisors (2861411).

323326561 is a wasteful number, since it uses less digits than its factorization.

323326561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861410.

The product of its digits is 19440, while the sum is 31.

The square root of 323326561 is about 17981.2836304865. The cubic root of 323326561 is about 686.3523542121.

Adding to 323326561 its reverse (165623323), we get a palindrome (488949884).

The spelling of 323326561 in words is "three hundred twenty-three million, three hundred twenty-six thousand, five hundred sixty-one".