205047401 has 8 divisors (see below), whose sum is σ = 221048520. Its totient is φ = 189078912.

The previous prime is 205047391. The next prime is 205047419. The reversal of 205047401 is 104740502.

It can be written as a sum of positive squares in 4 ways, for example, as 42510400 + 162537001 = 6520^2 + 12749^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 205047401 - 2¹⁰ = 205046377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205047431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5795 + ... + 21063.

It is an arithmetic number, because the mean of its divisors is an integer number (27631065).

Almost surely, 2^205047401 is an apocalyptic number.

It is an amenable number.

205047401 is a deficient number, since it is larger than the sum of its proper divisors (16001119).

205047401 is a wasteful number, since it uses less digits than its factorization.

205047401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16315.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 205047401 is about 14319.4762823226. The cubic root of 205047401 is about 589.6822966354.

Adding to 205047401 its reverse (104740502), we get a palindrome (309787903).

The spelling of 205047401 in words is "two hundred five million, forty-seven thousand, four hundred one".