204002321 has 4 divisors (see below), whose sum is σ = 204473892. Its totient is φ = 203530752.

The previous prime is 204002311. The next prime is 204002333. The reversal of 204002321 is 123200402.

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 101284096 + 102718225 = 10064^2 + 10135^2 .

It is a cyclic number.

It is not a de Polignac number, because 204002321 - 2⁶ = 204002257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204002296 and 204002305.

It is not an unprimeable number, because it can be changed into a prime (204002311) 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, 235136 + ... + 236001.

It is an arithmetic number, because the mean of its divisors is an integer number (51118473).

Almost surely, 2^204002321 is an apocalyptic number.

It is an amenable number.

204002321 is a deficient number, since it is larger than the sum of its proper divisors (471571).

204002321 is an equidigital number, since it uses as much as digits as its factorization.

204002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471570.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 204002321 is about 14282.9381081065. The cubic root of 204002321 is about 588.6787642260.

Adding to 204002321 its reverse (123200402), we get a palindrome (327202723).

The spelling of 204002321 in words is "two hundred four million, two thousand, three hundred twenty-one".