205513253411 has 8 divisors (see below), whose sum is σ = 209892232704. Its totient is φ = 201134539080.

The previous prime is 205513253383. The next prime is 205513253417. The reversal of 205513253411 is 114352315502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205513253411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205513253417) 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, 2914076 + ... + 2983766.

It is an arithmetic number, because the mean of its divisors is an integer number (26236529088).

Almost surely, 2^205513253411 is an apocalyptic number.

205513253411 is a deficient number, since it is larger than the sum of its proper divisors (4378979293).

205513253411 is an equidigital number, since it uses as much as digits as its factorization.

205513253411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132481.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 205513253411 its reverse (114352315502), we get a palindrome (319865568913).

The spelling of 205513253411 in words is "two hundred five billion, five hundred thirteen million, two hundred fifty-three thousand, four hundred eleven".