2111951173 has 2 divisors, whose sum is σ = 2111951174. Its totient is φ = 2111951172.

The previous prime is 2111951147. The next prime is 2111951201. The reversal of 2111951173 is 3711591112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1998358209 + 113592964 = 44703^2 + 10658^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111951173 - 2¹³ = 2111942981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111951113) 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 as a sum of consecutive naturals, namely, 1055975586 + 1055975587.

It is an arithmetic number, because the mean of its divisors is an integer number (1055975587).

Almost surely, 2^2111951173 is an apocalyptic number.

It is an amenable number.

2111951173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111951173 is an equidigital number, since it uses as much as digits as its factorization.

2111951173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 31.

The square root of 2111951173 is about 45955.9699386271. The cubic root of 2111951173 is about 1283.0038446571.

The spelling of 2111951173 in words is "two billion, one hundred eleven million, nine hundred fifty-one thousand, one hundred seventy-three".