2171651115 has 16 divisors (see below), whose sum is σ = 3489954048. Its totient is φ = 1153109856.

The previous prime is 2171651089. The next prime is 2171651123. The reversal of 2171651115 is 5111561712.

It is not a de Polignac number, because 2171651115 - 2²⁸ = 1903215659 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315487 + ... + 322296.

It is an arithmetic number, because the mean of its divisors is an integer number (218122128).

Almost surely, 2^2171651115 is an apocalyptic number.

2171651115 is a deficient number, since it is larger than the sum of its proper divisors (1318302933).

2171651115 is a wasteful number, since it uses less digits than its factorization.

2171651115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638018.

The product of its digits is 2100, while the sum is 30.

The square root of 2171651115 is about 46600.9776185007. The cubic root of 2171651115 is about 1294.9808666295.

The spelling of 2171651115 in words is "two billion, one hundred seventy-one million, six hundred fifty-one thousand, one hundred fifteen".