205918401 has 8 divisors (see below), whose sum is σ = 295677760. Its totient is φ = 126718992.

The previous prime is 205918381. The next prime is 205918417. The reversal of 205918401 is 104819502.

It is a happy number.

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

It is not a de Polignac number, because 205918401 - 2¹³ = 205910209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205918481) 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, 2639941 + ... + 2640018.

It is an arithmetic number, because the mean of its divisors is an integer number (36959720).

Almost surely, 2^205918401 is an apocalyptic number.

It is an amenable number.

205918401 is a deficient number, since it is larger than the sum of its proper divisors (89759359).

205918401 is a wasteful number, since it uses less digits than its factorization.

205918401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5279975.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 205918401 is about 14349.8571769896. The cubic root of 205918401 is about 590.5160676681.

The spelling of 205918401 in words is "two hundred five million, nine hundred eighteen thousand, four hundred one".