108400055 has 8 divisors (see below), whose sum is σ = 130205232. Its totient is φ = 86636608.

The previous prime is 108400049. The next prime is 108400069. The reversal of 108400055 is 550004801.

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-108400055 is a prime.

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 108400055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4397 + ... + 15366.

It is an arithmetic number, because the mean of its divisors is an integer number (16275654).

Almost surely, 2^108400055 is an apocalyptic number.

108400055 is a deficient number, since it is larger than the sum of its proper divisors (21805177).

108400055 is a wasteful number, since it uses less digits than its factorization.

108400055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20865.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 108400055 is about 10411.5347091579. The cubic root of 108400055 is about 476.8075982017.

Adding to 108400055 its reverse (550004801), we get a palindrome (658404856).

The spelling of 108400055 in words is "one hundred eight million, four hundred thousand, fifty-five".