55108515 has 32 divisors (see below), whose sum is σ = 109933056. Its totient is φ = 22901760.

The previous prime is 55108511. The next prime is 55108517. The reversal of 55108515 is 51580155.

55108515 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 55108515 - 2² = 55108511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55108511) 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 31 ways as a sum of consecutive naturals, for example, 22702 + ... + 25011.

It is an arithmetic number, because the mean of its divisors is an integer number (3435408).

Almost surely, 2^55108515 is an apocalyptic number.

55108515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55108515 is a deficient number, since it is larger than the sum of its proper divisors (54824541).

55108515 is a wasteful number, since it uses less digits than its factorization.

55108515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47739.

The product of its (nonzero) digits is 5000, while the sum is 30.

The square root of 55108515 is about 7423.5109618024. The cubic root of 55108515 is about 380.5451892757.

The spelling of 55108515 in words is "fifty-five million, one hundred eight thousand, five hundred fifteen".