322809681 has 4 divisors (see below), whose sum is σ = 430412912. Its totient is φ = 215206452.

The previous prime is 322809679. The next prime is 322809703. The reversal of 322809681 is 186908223.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186908223 = 3 ⋅62302741.

It is not a de Polignac number, because 322809681 - 2¹ = 322809679 is a prime.

It is a super-2 number, since 2×322809681² = 208412180294643522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (322809611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53801611 + ... + 53801616.

It is an arithmetic number, because the mean of its divisors is an integer number (107603228).

Almost surely, 2^322809681 is an apocalyptic number.

It is an amenable number.

322809681 is a deficient number, since it is larger than the sum of its proper divisors (107603231).

322809681 is a wasteful number, since it uses less digits than its factorization.

322809681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107603230.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 322809681 is about 17966.9051592087. The cubic root of 322809681 is about 685.9864176635.

The spelling of 322809681 in words is "three hundred twenty-two million, eight hundred nine thousand, six hundred eighty-one".