211995928205 has 8 divisors (see below), whose sum is σ = 255207879672. Its totient is φ = 169054898688.

The previous prime is 211995928181. The next prime is 211995928213. The reversal of 211995928205 is 502829599112.

It can be written as a sum of positive squares in 4 ways, for example, as 44342281 + 211951585924 = 6659^2 + 460382^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211995928205 - 2³⁰ = 210922186381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67728764 + ... + 67731893.

It is an arithmetic number, because the mean of its divisors is an integer number (31900984959).

Almost surely, 2^211995928205 is an apocalyptic number.

It is an amenable number.

211995928205 is a deficient number, since it is larger than the sum of its proper divisors (43211951467).

211995928205 is a wasteful number, since it uses less digits than its factorization.

211995928205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135460975.

The product of its (nonzero) digits is 1166400, while the sum is 53.

The spelling of 211995928205 in words is "two hundred eleven billion, nine hundred ninety-five million, nine hundred twenty-eight thousand, two hundred five".