2115321155 has 16 divisors (see below), whose sum is σ = 2651330880. Its totient is φ = 1617103488.

The previous prime is 2115321149. The next prime is 2115321181. The reversal of 2115321155 is 5511235112.

It is a cyclic number.

It is not a de Polignac number, because 2115321155 - 2⁸ = 2115320899 is a prime.

It is an unprimeable number.

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, 117281 + ... + 134109.

It is an arithmetic number, because the mean of its divisors is an integer number (165708180).

Almost surely, 2^2115321155 is an apocalyptic number.

2115321155 is a deficient number, since it is larger than the sum of its proper divisors (536009725).

2115321155 is a wasteful number, since it uses less digits than its factorization.

2115321155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17950.

The product of its digits is 1500, while the sum is 26.

The square root of 2115321155 is about 45992.6206581012. The cubic root of 2115321155 is about 1283.6858999082.

Adding to 2115321155 its reverse (5511235112), we get a palindrome (7626556267).

The spelling of 2115321155 in words is "two billion, one hundred fifteen million, three hundred twenty-one thousand, one hundred fifty-five".