2115165540 has 48 divisors (see below), whose sum is σ = 5926419072. Its totient is φ = 563667456.

The previous prime is 2115165509. The next prime is 2115165541. The reversal of 2115165540 is 455615112.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2115165498 and 2115165507.

It is not an unprimeable number, because it can be changed into a prime (2115165541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85452 + ... + 107388.

It is an arithmetic number, because the mean of its divisors is an integer number (123467064).

Almost surely, 2^2115165540 is an apocalyptic number.

2115165540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115165540 is an abundant number, since it is smaller than the sum of its proper divisors (3811253532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2115165540 is a wasteful number, since it uses less digits than its factorization.

2115165540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23556 (or 23554 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 2115165540 is about 45990.9288882058. The cubic root of 2115165540 is about 1283.6544207354.

The spelling of 2115165540 in words is "two billion, one hundred fifteen million, one hundred sixty-five thousand, five hundred forty".