205144013 has 8 divisors (see below), whose sum is σ = 210110208. Its totient is φ = 200186784.

The previous prime is 205144001. The next prime is 205144031. The reversal of 205144013 is 310441502.

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 205144013 - 2¹⁰ = 205142989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205144813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77081 + ... + 79697.

It is an arithmetic number, because the mean of its divisors is an integer number (26263776).

Almost surely, 2^205144013 is an apocalyptic number.

It is an amenable number.

205144013 is a deficient number, since it is larger than the sum of its proper divisors (4966195).

205144013 is a wasteful number, since it uses less digits than its factorization.

205144013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483.

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

The square root of 205144013 is about 14322.8493324478. The cubic root of 205144013 is about 589.7748954533.

Adding to 205144013 its reverse (310441502), we get a palindrome (515585515).

It can be divided in two parts, 2051 and 44013, that added together give a palindrome (46064).

The spelling of 205144013 in words is "two hundred five million, one hundred forty-four thousand, thirteen".