2166515473 has 2 divisors, whose sum is σ = 2166515474. Its totient is φ = 2166515472.

The previous prime is 2166515447. The next prime is 2166515537. The reversal of 2166515473 is 3745156612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2148137104 + 18378369 = 46348^2 + 4287^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166515473 - 2²⁵ = 2132961041 is a prime.

It is not a weakly prime, because it can be changed into another prime (2166515423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083257736 + 1083257737.

It is an arithmetic number, because the mean of its divisors is an integer number (1083257737).

Almost surely, 2^2166515473 is an apocalyptic number.

It is an amenable number.

2166515473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166515473 is an equidigital number, since it uses as much as digits as its factorization.

2166515473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 40.

The square root of 2166515473 is about 46545.8427037260. The cubic root of 2166515473 is about 1293.9592464871.

The spelling of 2166515473 in words is "two billion, one hundred sixty-six million, five hundred fifteen thousand, four hundred seventy-three".