81147106 has 8 divisors (see below), whose sum is σ = 124551504. Its totient is φ = 39629940.

The previous prime is 81147097. The next prime is 81147109. The reversal of 81147106 is 60174118.

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

It is not an unprimeable number, because it can be changed into a prime (81147109) 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 3 ways as a sum of consecutive naturals, for example, 471700 + ... + 471871.

It is an arithmetic number, because the mean of its divisors is an integer number (15568938).

Almost surely, 2^81147106 is an apocalyptic number.

81147106 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

81147106 is a deficient number, since it is larger than the sum of its proper divisors (43404398).

81147106 is a wasteful number, since it uses less digits than its factorization.

81147106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943616.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 81147106 is about 9008.1688483287. The cubic root of 81147106 is about 432.9366430136.

The spelling of 81147106 in words is "eighty-one million, one hundred forty-seven thousand, one hundred six".