205351404213 has 4 divisors (see below), whose sum is σ = 273801872288. Its totient is φ = 136900936140.

The previous prime is 205351404199. The next prime is 205351404221. The reversal of 205351404213 is 312404153502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 205351404213 - 2⁹ = 205351403701 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 (205351404263) 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, 34225234033 + ... + 34225234038.

It is an arithmetic number, because the mean of its divisors is an integer number (68450468072).

Almost surely, 2^205351404213 is an apocalyptic number.

It is an amenable number.

205351404213 is a deficient number, since it is larger than the sum of its proper divisors (68450468075).

205351404213 is an equidigital number, since it uses as much as digits as its factorization.

205351404213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68450468074.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 205351404213 its reverse (312404153502), we get a palindrome (517755557715).

The spelling of 205351404213 in words is "two hundred five billion, three hundred fifty-one million, four hundred four thousand, two hundred thirteen".