81106715 has 8 divisors (see below), whose sum is σ = 97422480. Its totient is φ = 64822432.

The previous prime is 81106709. The next prime is 81106741. The reversal of 81106715 is 51760118.

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

It is a cyclic number.

It is not a de Polignac number, because 81106715 - 2⁴ = 81106699 is a prime.

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, 1769 + ... + 12858.

It is an arithmetic number, because the mean of its divisors is an integer number (12177810).

Almost surely, 2^81106715 is an apocalyptic number.

81106715 is a deficient number, since it is larger than the sum of its proper divisors (16315765).

81106715 is a wasteful number, since it uses less digits than its factorization.

81106715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15741.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 81106715 is about 9005.9266597058. The cubic root of 81106715 is about 432.8647996378.

The spelling of 81106715 in words is "eighty-one million, one hundred six thousand, seven hundred fifteen".