2166510515 has 16 divisors (see below), whose sum is σ = 2964493728. Its totient is φ = 1505773056.

The previous prime is 2166510509. The next prime is 2166510557. The reversal of 2166510515 is 5150156612.

It is a cyclic number.

It is not a de Polignac number, because 2166510515 - 2¹⁰ = 2166509491 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979217 + ... + 981426.

It is an arithmetic number, because the mean of its divisors is an integer number (185280858).

Almost surely, 2^2166510515 is an apocalyptic number.

2166510515 is a deficient number, since it is larger than the sum of its proper divisors (797983213).

2166510515 is a wasteful number, since it uses less digits than its factorization.

2166510515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960678.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 2166510515 is about 46545.7894443740. The cubic root of 2166510515 is about 1293.9582594252.

The spelling of 2166510515 in words is "two billion, one hundred sixty-six million, five hundred ten thousand, five hundred fifteen".