204251321 has 8 divisors (see below), whose sum is σ = 212395080. Its totient is φ = 196180992.

The previous prime is 204251303. The next prime is 204251353. The reversal of 204251321 is 123152402.

It can be written as a sum of positive squares in 4 ways, for example, as 190096 + 204061225 = 436^2 + 14285^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204251321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 204251293 and 204251302.

It is not an unprimeable number, because it can be changed into a prime (204221321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12650 + ... + 23843.

It is an arithmetic number, because the mean of its divisors is an integer number (26549385).

Almost surely, 2^204251321 is an apocalyptic number.

It is an amenable number.

204251321 is a deficient number, since it is larger than the sum of its proper divisors (8143759).

204251321 is a wasteful number, since it uses less digits than its factorization.

204251321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36715.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 204251321 is about 14291.6521438216. The cubic root of 204251321 is about 588.9181755789.

The spelling of 204251321 in words is "two hundred four million, two hundred fifty-one thousand, three hundred twenty-one".