205330030311 has 8 divisors (see below), whose sum is σ = 312883855744. Its totient is φ = 117331445880.

The previous prime is 205330030291. The next prime is 205330030313. The reversal of 205330030311 is 113030033502.

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

It is not a de Polignac number, because 205330030311 - 2¹¹ = 205330028263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 9777620491 = 205330030311 / (2 + 0 + 5 + 3 + 3 + 0 + 0 + 3 + 0 + 3 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205330030313) 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, 4888810225 + ... + 4888810266.

It is an arithmetic number, because the mean of its divisors is an integer number (39110481968).

Almost surely, 2^205330030311 is an apocalyptic number.

205330030311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

205330030311 is a deficient number, since it is larger than the sum of its proper divisors (107553825433).

205330030311 is an equidigital number, since it uses as much as digits as its factorization.

205330030311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9777620501.

The product of its (nonzero) digits is 810, while the sum is 21.

Adding to 205330030311 its reverse (113030033502), we get a palindrome (318360063813).

The spelling of 205330030311 in words is "two hundred five billion, three hundred thirty million, thirty thousand, three hundred eleven".