2155500055 has 8 divisors (see below), whose sum is σ = 2611713312. Its totient is φ = 1707657888.

The previous prime is 2155500043. The next prime is 2155500059. The reversal of 2155500055 is 5500055512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155500055 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2155499996 and 2155500032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155500059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2092204 + ... + 2093233.

It is an arithmetic number, because the mean of its divisors is an integer number (326464164).

Almost surely, 2^2155500055 is an apocalyptic number.

2155500055 is a deficient number, since it is larger than the sum of its proper divisors (456213257).

2155500055 is a wasteful number, since it uses less digits than its factorization.

2155500055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185545.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 2155500055 is about 46427.3632139496. The cubic root of 2155500055 is about 1291.7625197730.

Adding to 2155500055 its reverse (5500055512), we get a palindrome (7655555567).

The spelling of 2155500055 in words is "two billion, one hundred fifty-five million, five hundred thousand, fifty-five".