2156328915 has 32 divisors (see below), whose sum is σ = 3753857856. Its totient is φ = 1050624000.

The previous prime is 2156328893. The next prime is 2156328919. The reversal of 2156328915 is 5198236512.

2156328915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2156328915 - 2⁷ = 2156328787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156328919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38086 + ... + 75915.

It is an arithmetic number, because the mean of its divisors is an integer number (117308058).

Almost surely, 2^2156328915 is an apocalyptic number.

2156328915 is a deficient number, since it is larger than the sum of its proper divisors (1597528941).

2156328915 is a wasteful number, since it uses less digits than its factorization.

2156328915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114119.

The product of its digits is 129600, while the sum is 42.

The square root of 2156328915 is about 46436.2887728983. The cubic root of 2156328915 is about 1291.9280734799.

The spelling of 2156328915 in words is "two billion, one hundred fifty-six million, three hundred twenty-eight thousand, nine hundred fifteen".