2173122511 has 24 divisors (see below), whose sum is σ = 2752758000. Its totient is φ = 1703769984.

The previous prime is 2173122493. The next prime is 2173122551. The reversal of 2173122511 is 1152213712.

It is not a de Polignac number, because 2173122511 - 2¹¹ = 2173120463 is a prime.

It is a super-2 number, since 2×2173122511² = 9444922895629890242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173122551) 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 23 ways as a sum of consecutive naturals, for example, 13246 + ... + 67243.

It is an arithmetic number, because the mean of its divisors is an integer number (114698250).

Almost surely, 2^2173122511 is an apocalyptic number.

2173122511 is a deficient number, since it is larger than the sum of its proper divisors (579635489).

2173122511 is a wasteful number, since it uses less digits than its factorization.

2173122511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80551 (or 80544 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 2173122511 is about 46616.7621247980. The cubic root of 2173122511 is about 1295.2732707940.

The spelling of 2173122511 in words is "two billion, one hundred seventy-three million, one hundred twenty-two thousand, five hundred eleven".