321004081 has 4 divisors (see below), whose sum is σ = 339886692. Its totient is φ = 302121472.

The previous prime is 321004063. The next prime is 321004091. The reversal of 321004081 is 180400123.

321004081 is nontrivially palindromic in base 4 and base 16.

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 247747600 + 73256481 = 15740^2 + 8559^2 .

It is a cyclic number.

It is not a de Polignac number, because 321004081 - 2²³ = 312615473 is a prime.

It is a super-2 number, since 2×321004081² = 206087240037309122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321004091) 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, 9441280 + ... + 9441313.

It is an arithmetic number, because the mean of its divisors is an integer number (84971673).

Almost surely, 2^321004081 is an apocalyptic number.

It is an amenable number.

321004081 is a deficient number, since it is larger than the sum of its proper divisors (18882611).

321004081 is a wasteful number, since it uses less digits than its factorization.

321004081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18882610.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 321004081 is about 17916.5867564109. The cubic root of 321004081 is about 684.7050293746.

The spelling of 321004081 in words is "three hundred twenty-one million, four thousand, eighty-one".