2155065117 has 16 divisors (see below), whose sum is σ = 2918172672. Its totient is φ = 1414361520.

The previous prime is 2155065091. The next prime is 2155065131. The reversal of 2155065117 is 7115605512.

It is a happy number.

2155065117 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 2155065117 - 2⁸ = 2155064861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155065617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482388 + ... + 486834.

It is an arithmetic number, because the mean of its divisors is an integer number (182385792).

Almost surely, 2^2155065117 is an apocalyptic number.

It is an amenable number.

2155065117 is a deficient number, since it is larger than the sum of its proper divisors (763107555).

2155065117 is a wasteful number, since it uses less digits than its factorization.

2155065117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6928.

The product of its (nonzero) digits is 10500, while the sum is 33.

The square root of 2155065117 is about 46422.6789080510. The cubic root of 2155065117 is about 1291.6756297419.

The spelling of 2155065117 in words is "two billion, one hundred fifty-five million, sixty-five thousand, one hundred seventeen".