8118155 has 4 divisors (see below), whose sum is σ = 9741792. Its totient is φ = 6494520.

The previous prime is 8118139. The next prime is 8118157. The reversal of 8118155 is 5518118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5518118 = 2 ⋅2759059.

It is not a de Polignac number, because 8118155 - 2⁴ = 8118139 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8118157) 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 3 ways as a sum of consecutive naturals, for example, 811811 + ... + 811820.

It is an arithmetic number, because the mean of its divisors is an integer number (2435448).

Almost surely, 2^8118155 is an apocalyptic number.

8118155 is a deficient number, since it is larger than the sum of its proper divisors (1623637).

8118155 is a wasteful number, since it uses less digits than its factorization.

8118155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623636.

The product of its digits is 1600, while the sum is 29.

The square root of 8118155 is about 2849.2376173285. The cubic root of 8118155 is about 200.9798169548.

The spelling of 8118155 in words is "eight million, one hundred eighteen thousand, one hundred fifty-five".