2101952173 has 2 divisors, whose sum is σ = 2101952174. Its totient is φ = 2101952172.

The previous prime is 2101952147. The next prime is 2101952183. The reversal of 2101952173 is 3712591012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1784471049 + 317481124 = 42243^2 + 17818^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101952173 - 2⁵ = 2101952141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101952143) by changing a digit.

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 as a sum of consecutive naturals, namely, 1050976086 + 1050976087.

It is an arithmetic number, because the mean of its divisors is an integer number (1050976087).

Almost surely, 2^2101952173 is an apocalyptic number.

It is an amenable number.

2101952173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101952173 is an equidigital number, since it uses as much as digits as its factorization.

2101952173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 2101952173 is about 45847.0519553875. The cubic root of 2101952173 is about 1280.9758535312.

The spelling of 2101952173 in words is "two billion, one hundred one million, nine hundred fifty-two thousand, one hundred seventy-three".