2051172211 has 4 divisors (see below), whose sum is σ = 2237642424. Its totient is φ = 1864702000.

The previous prime is 2051172191. The next prime is 2051172259. The reversal of 2051172211 is 1122711502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051172211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051172611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93235090 + ... + 93235111.

It is an arithmetic number, because the mean of its divisors is an integer number (559410606).

Almost surely, 2^2051172211 is an apocalyptic number.

2051172211 is a deficient number, since it is larger than the sum of its proper divisors (186470213).

2051172211 is a wasteful number, since it uses less digits than its factorization.

2051172211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186470212.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 2051172211 is about 45289.8687456698. The cubic root of 2051172211 is about 1270.5761766521.

Adding to 2051172211 its reverse (1122711502), we get a palindrome (3173883713).

The spelling of 2051172211 in words is "two billion, fifty-one million, one hundred seventy-two thousand, two hundred eleven".