321108481 has 4 divisors (see below), whose sum is σ = 321168964. Its totient is φ = 321048000.

The previous prime is 321108479. The next prime is 321108499. The reversal of 321108481 is 184801123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184801123 = 13 ⋅14215471.

It can be written as a sum of positive squares in 2 ways, for example, as 123565456 + 197543025 = 11116^2 + 14055^2 .

It is a cyclic number.

It is not a de Polignac number, because 321108481 - 2¹ = 321108479 is a prime.

It is a super-2 number, since 2×321108481² = 206221313140254722, which contains 22 as substring.

It is the 17920-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321108401) by changing a digit.

It is a nontrivial repunit in base 17919.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21420 + ... + 33181.

It is an arithmetic number, because the mean of its divisors is an integer number (80292241).

Almost surely, 2^321108481 is an apocalyptic number.

It is an amenable number.

321108481 is a deficient number, since it is larger than the sum of its proper divisors (60483).

321108481 is an equidigital number, since it uses as much as digits as its factorization.

321108481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60482.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 321108481 is about 17919.5000209269. The cubic root of 321108481 is about 684.7792500894.

The spelling of 321108481 in words is "three hundred twenty-one million, one hundred eight thousand, four hundred eighty-one".