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204401 = 238887
BaseRepresentation
bin110001111001110001
3101101101102
4301321301
523020101
64214145
71510631
oct617161
9341342
10204401
1112a62a
129a355
1372062
14546c1
154086b
hex31e71

204401 has 4 divisors (see below), whose sum is σ = 213312. Its totient is φ = 195492.

The previous prime is 204397. The next prime is 204427. The reversal of 204401 is 104402.

Adding to 204401 its reverse (104402), we get a palindrome (308803).

Subtracting from 204401 its reverse (104402), we obtain a palindrome (99999).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104402 = 252201.

It is a cyclic number.

It is not a de Polignac number, because 204401 - 22 = 204397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204431) 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, 4421 + ... + 4466.

It is an arithmetic number, because the mean of its divisors is an integer number (53328).

2204401 is an apocalyptic number.

It is an amenable number.

204401 is a deficient number, since it is larger than the sum of its proper divisors (8911).

204401 is an equidigital number, since it uses as much as digits as its factorization.

204401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 204401 is about 452.1072881518. The cubic root of 204401 is about 58.9061997023.

The spelling of 204401 in words is "two hundred four thousand, four hundred one", and thus it is an iban number.

Divisors: 1 23 8887 204401