321344004431 has 4 divisors (see below), whose sum is σ = 332424832200. Its totient is φ = 310263176664.

The previous prime is 321344004389. The next prime is 321344004481. The reversal of 321344004431 is 134400443123.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 321344004431 - 2¹⁸ = 321343742287 is a prime.

It is a super-2 number, since 2×321344004431² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 11080827739 = 321344004431 / (3 + 2 + 1 + 3 + 4 + 4 + 0 + 0 + 4 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321344004394 and 321344004403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321344004481) 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, 5540413841 + ... + 5540413898.

It is an arithmetic number, because the mean of its divisors is an integer number (83106208050).

Almost surely, 2^321344004431 is an apocalyptic number.

321344004431 is a deficient number, since it is larger than the sum of its proper divisors (11080827769).

321344004431 is a wasteful number, since it uses less digits than its factorization.

321344004431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11080827768.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 321344004431 its reverse (134400443123), we get a palindrome (455744447554).

The spelling of 321344004431 in words is "three hundred twenty-one billion, three hundred forty-four million, four thousand, four hundred thirty-one".