205013581351 has 4 divisors (see below), whose sum is σ = 205014562704. Its totient is φ = 205012600000.

The previous prime is 205013581313. The next prime is 205013581397. The reversal of 205013581351 is 153185310502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 205013581351 - 2⁹ = 205013580839 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 (205013581651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38275 + ... + 641476.

It is an arithmetic number, because the mean of its divisors is an integer number (51253640676).

Almost surely, 2^205013581351 is an apocalyptic number.

205013581351 is a deficient number, since it is larger than the sum of its proper divisors (981353).

205013581351 is an equidigital number, since it uses as much as digits as its factorization.

205013581351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981352.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 205013581351 its reverse (153185310502), we get a palindrome (358198891853).

The spelling of 205013581351 in words is "two hundred five billion, thirteen million, five hundred eighty-one thousand, three hundred fifty-one".