8131280155 has 4 divisors (see below), whose sum is σ = 9757536192. Its totient is φ = 6505024120.

The previous prime is 8131280111. The next prime is 8131280219. The reversal of 8131280155 is 5510821318.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5510821318 = 2 ⋅2755410659.

It is not a de Polignac number, because 8131280155 - 2²⁵ = 8097725723 is a prime.

It is a super-2 number, since 2×8131280155² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8131280155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813128011 + ... + 813128020.

It is an arithmetic number, because the mean of its divisors is an integer number (2439384048).

Almost surely, 2^8131280155 is an apocalyptic number.

8131280155 is a deficient number, since it is larger than the sum of its proper divisors (1626256037).

8131280155 is a wasteful number, since it uses less digits than its factorization.

8131280155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626256036.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 8131280155 is about 90173.6111897489. The cubic root of 8131280155 is about 2010.8807106375.

The spelling of 8131280155 in words is "eight billion, one hundred thirty-one million, two hundred eighty thousand, one hundred fifty-five".