321043013 has 4 divisors (see below), whose sum is σ = 326484480. Its totient is φ = 315601548.

The previous prime is 321042983. The next prime is 321043049. The reversal of 321043013 is 310340123.

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: 310340123 = 61 ⋅5087543.

It is a cyclic number.

It is not a de Polignac number, because 321043013 - 2⁶ = 321042949 is a prime.

It is a super-2 number, since 2×321043013² = 206137232392236338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321042982 and 321043000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321043213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2720645 + ... + 2720762.

It is an arithmetic number, because the mean of its divisors is an integer number (81621120).

Almost surely, 2^321043013 is an apocalyptic number.

It is an amenable number.

321043013 is a deficient number, since it is larger than the sum of its proper divisors (5441467).

321043013 is an equidigital number, since it uses as much as digits as its factorization.

321043013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5441466.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 321043013 is about 17917.6732027348. The cubic root of 321043013 is about 684.7327090420.

Adding to 321043013 its reverse (310340123), we get a palindrome (631383136).

The spelling of 321043013 in words is "three hundred twenty-one million, forty-three thousand, thirteen".