321444343503 has 12 divisors (see below), whose sum is σ = 480319134360. Its totient is φ = 206906703696.

The previous prime is 321444343471. The next prime is 321444343511. The reversal of 321444343503 is 305343444123.

It is a happy number.

321444343503 is a `hidden beast` number, since 3 + 2 + 144 + 4 + 3 + 4 + 3 + 503 = 666.

It is not a de Polignac number, because 321444343503 - 2⁵ = 321444343471 is a prime.

It is a super-2 number, since 2×321444343503² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321444343903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 615793501 + ... + 615794022.

It is an arithmetic number, because the mean of its divisors is an integer number (40026594530).

Almost surely, 2^321444343503 is an apocalyptic number.

321444343503 is a deficient number, since it is larger than the sum of its proper divisors (158874790857).

321444343503 is a wasteful number, since it uses less digits than its factorization.

321444343503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231587558 (or 1231587555 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 36.

Adding to 321444343503 its reverse (305343444123), we get a palindrome (626787787626).

The spelling of 321444343503 in words is "three hundred twenty-one billion, four hundred forty-four million, three hundred forty-three thousand, five hundred three".