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81071106 = 2321416311
BaseRepresentation
bin1001101010100…
…00110000000010
312122112211122120
410311100300002
5131223233411
612013345110
72003043624
oct465206002
9178484576
1081071106
1141842a16
1223198196
1313a46a8c
14aaa4c14
1571b6106
hex4d50c02

81071106 has 16 divisors (see below), whose sum is σ = 162243648. Its totient is φ = 27006800.

The previous prime is 81071077. The next prime is 81071129. The reversal of 81071106 is 60117018.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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, 9691 + ... + 16001.

It is an arithmetic number, because the mean of its divisors is an integer number (10140228).

Almost surely, 281071106 is an apocalyptic number.

81071106 is an abundant number, since it is smaller than the sum of its proper divisors (81172542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81071106 is a wasteful number, since it uses less digits than its factorization.

81071106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8457.

The product of its (nonzero) digits is 336, while the sum is 24.

The square root of 81071106 is about 9003.9494667618. The cubic root of 81071106 is about 432.8014422082.

The spelling of 81071106 in words is "eighty-one million, seventy-one thousand, one hundred six".

Divisors: 1 2 3 6 2141 4282 6311 6423 12622 12846 18933 37866 13511851 27023702 40535553 81071106