2161310515 has 32 divisors (see below), whose sum is σ = 3360107520. Its totient is φ = 1296031104.

The previous prime is 2161310507. The next prime is 2161310527. The reversal of 2161310515 is 5150131612.

It is a happy number.

2161310515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2161310515 - 2³ = 2161310507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2161310515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116359 + ... + 133648.

It is an arithmetic number, because the mean of its divisors is an integer number (105003360).

Almost surely, 2^2161310515 is an apocalyptic number.

2161310515 is a deficient number, since it is larger than the sum of its proper divisors (1198797005).

2161310515 is a wasteful number, since it uses less digits than its factorization.

2161310515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250051.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 2161310515 is about 46489.8969132004. The cubic root of 2161310515 is about 1292.9221888489.

The spelling of 2161310515 in words is "two billion, one hundred sixty-one million, three hundred ten thousand, five hundred fifteen".