205286401 has 4 divisors (see below), whose sum is σ = 205316032. Its totient is φ = 205256772.

The previous prime is 205286381. The next prime is 205286413. The reversal of 205286401 is 104682502.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205286401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205286401.

It is not an unprimeable number, because it can be changed into a prime (205286461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1756 + ... + 20338.

It is an arithmetic number, because the mean of its divisors is an integer number (51329008).

Almost surely, 2^205286401 is an apocalyptic number.

It is an amenable number.

205286401 is a deficient number, since it is larger than the sum of its proper divisors (29631).

205286401 is a wasteful number, since it uses less digits than its factorization.

205286401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29630.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 205286401 is about 14327.8191292325. The cubic root of 205286401 is about 589.9113157903.

The spelling of 205286401 in words is "two hundred five million, two hundred eighty-six thousand, four hundred one".