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81106 = 2107379
BaseRepresentation
bin10011110011010010
311010020221
4103303102
510043411
61423254
7455314
oct236322
9133227
1081106
1155a33
123ab2a
132abbc
14217b4
1519071
hex13cd2

81106 has 8 divisors (see below), whose sum is σ = 123120. Its totient is φ = 40068.

The previous prime is 81101. The next prime is 81119. The reversal of 81106 is 60118.

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

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 81106.

It is not an unprimeable number, because it can be changed into a prime (81101) by changing a digit.

81106 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25 + ... + 403.

It is an arithmetic number, because the mean of its divisors is an integer number (15390).

281106 is an apocalyptic number.

81106 is a deficient number, since it is larger than the sum of its proper divisors (42014).

81106 is a wasteful number, since it uses less digits than its factorization.

81106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 81106 is about 284.7911515479. The cubic root of 81106 is about 43.2863527654.

The spelling of 81106 in words is "eighty-one thousand, one hundred six".

Divisors: 1 2 107 214 379 758 40553 81106