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108104155 = 521620831
BaseRepresentation
bin1100111000110…
…00100111011011
321112102021000121
412130120213123
5210133313110
614421014111
72451604315
oct634304733
9245367017
10108104155
1156027285
1230254337
1319520473
14105007b5
159755cda
hex67189db

108104155 has 4 divisors (see below), whose sum is σ = 129724992. Its totient is φ = 86483320.

The previous prime is 108104149. The next prime is 108104179. The reversal of 108104155 is 551401801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551401801 = 1661933179.

It is not a de Polignac number, because 108104155 - 23 = 108104147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10810411 + ... + 10810420.

It is an arithmetic number, because the mean of its divisors is an integer number (32431248).

Almost surely, 2108104155 is an apocalyptic number.

108104155 is a deficient number, since it is larger than the sum of its proper divisors (21620837).

108104155 is an equidigital number, since it uses as much as digits as its factorization.

108104155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21620836.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 108104155 is about 10397.3147975812. The cubic root of 108104155 is about 476.3733550675.

Adding to 108104155 its reverse (551401801), we get a palindrome (659505956).

The spelling of 108104155 in words is "one hundred eight million, one hundred four thousand, one hundred fifty-five".

Divisors: 1 5 21620831 108104155