2105651617 has 2 divisors, whose sum is σ = 2105651618. Its totient is φ = 2105651616.

The previous prime is 2105651593. The next prime is 2105651627. The reversal of 2105651617 is 7161565012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1901047201 + 204604416 = 43601^2 + 14304^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105651617 - 2⁷ = 2105651489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105651627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052825808 + 1052825809.

It is an arithmetic number, because the mean of its divisors is an integer number (1052825809).

Almost surely, 2^2105651617 is an apocalyptic number.

It is an amenable number.

2105651617 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105651617 is an equidigital number, since it uses as much as digits as its factorization.

2105651617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 2105651617 is about 45887.3797138167. The cubic root of 2105651617 is about 1281.7269205713.

The spelling of 2105651617 in words is "two billion, one hundred five million, six hundred fifty-one thousand, six hundred seventeen".