2117505161 has 2 divisors, whose sum is σ = 2117505162. Its totient is φ = 2117505160.

The previous prime is 2117505157. The next prime is 2117505191. The reversal of 2117505161 is 1615057112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1335463936 + 782041225 = 36544^2 + 27965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117505161 - 2² = 2117505157 is a prime.

It is not a weakly prime, because it can be changed into another prime (2117505101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058752580 + 1058752581.

It is an arithmetic number, because the mean of its divisors is an integer number (1058752581).

Almost surely, 2^2117505161 is an apocalyptic number.

It is an amenable number.

2117505161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117505161 is an equidigital number, since it uses as much as digits as its factorization.

2117505161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 29.

The square root of 2117505161 is about 46016.3575372932. The cubic root of 2117505161 is about 1284.1275370852.

The spelling of 2117505161 in words is "two billion, one hundred seventeen million, five hundred five thousand, one hundred sixty-one".