211304516155 has 4 divisors (see below), whose sum is σ = 253565419392. Its totient is φ = 169043612920.

The previous prime is 211304516131. The next prime is 211304516197. The reversal of 211304516155 is 551615403112.

211304516155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 211304516155 - 2¹⁵ = 211304483387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211304516155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21130451611 + ... + 21130451620.

It is an arithmetic number, because the mean of its divisors is an integer number (63391354848).

Almost surely, 2^211304516155 is an apocalyptic number.

211304516155 is a deficient number, since it is larger than the sum of its proper divisors (42260903237).

211304516155 is an equidigital number, since it uses as much as digits as its factorization.

211304516155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42260903236.

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

Adding to 211304516155 its reverse (551615403112), we get a palindrome (762919919267).

The spelling of 211304516155 in words is "two hundred eleven billion, three hundred four million, five hundred sixteen thousand, one hundred fifty-five".