205513143105 has 16 divisors (see below), whose sum is σ = 329175002880. Its totient is φ = 109489018368.

The previous prime is 205513143079. The next prime is 205513143107. The reversal of 205513143105 is 501341315502.

It is not a de Polignac number, because 205513143105 - 2¹³ = 205513134913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205513143107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7360057 + ... + 7387926.

It is an arithmetic number, because the mean of its divisors is an integer number (20573437680).

Almost surely, 2^205513143105 is an apocalyptic number.

It is an amenable number.

205513143105 is a deficient number, since it is larger than the sum of its proper divisors (123661859775).

205513143105 is a wasteful number, since it uses less digits than its factorization.

205513143105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14748920.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 205513143105 its reverse (501341315502), we get a palindrome (706854458607).

The spelling of 205513143105 in words is "two hundred five billion, five hundred thirteen million, one hundred forty-three thousand, one hundred five".