321320223 has 16 divisors (see below), whose sum is σ = 544034560. Its totient is φ = 183611448.

The previous prime is 321320221. The next prime is 321320269. The reversal of 321320223 is 322023123.

It is a happy number.

321320223 is a `hidden beast` number, since 321 + 320 + 2 + 23 = 666.

It is not a de Polignac number, because 321320223 - 2¹ = 321320221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321320196 and 321320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321320221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849865 + ... + 850242.

It is an arithmetic number, because the mean of its divisors is an integer number (34002160).

Almost surely, 2^321320223 is an apocalyptic number.

321320223 is a deficient number, since it is larger than the sum of its proper divisors (222714337).

321320223 is a wasteful number, since it uses less digits than its factorization.

321320223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700123 (or 1700117 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 321320223 is about 17925.4071920277. The cubic root of 321320223 is about 684.9297336772.

Adding to 321320223 its reverse (322023123), we get a palindrome (643343346).

It can be divided in two parts, 3213 and 20223, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 321320223 in words is "three hundred twenty-one million, three hundred twenty thousand, two hundred twenty-three".