2102215217 has 2 divisors, whose sum is σ = 2102215218. Its totient is φ = 2102215216.

The previous prime is 2102215207. The next prime is 2102215231. The reversal of 2102215217 is 7125122012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1295712016 + 806503201 = 35996^2 + 28399^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102215217 - 2⁶ = 2102215153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102215192 and 2102215201.

It is not a weakly prime, because it can be changed into another prime (2102215207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051107608 + 1051107609.

It is an arithmetic number, because the mean of its divisors is an integer number (1051107609).

Almost surely, 2^2102215217 is an apocalyptic number.

It is an amenable number.

2102215217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102215217 is an equidigital number, since it uses as much as digits as its factorization.

2102215217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2102215217 is about 45849.9205779029. The cubic root of 2102215217 is about 1281.0292862341.

Adding to 2102215217 its reverse (7125122012), we get a palindrome (9227337229).

The spelling of 2102215217 in words is "two billion, one hundred two million, two hundred fifteen thousand, two hundred seventeen".