81714165 has 16 divisors (see below), whose sum is σ = 140800128. Its totient is φ = 40228416.

The previous prime is 81714119. The next prime is 81714173. The reversal of 81714165 is 56141718.

It is a happy number.

It is not a de Polignac number, because 81714165 - 2²² = 77519861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209329 + ... + 209718.

It is an arithmetic number, because the mean of its divisors is an integer number (8800008).

Almost surely, 2^81714165 is an apocalyptic number.

It is an amenable number.

81714165 is a deficient number, since it is larger than the sum of its proper divisors (59085963).

81714165 is a wasteful number, since it uses less digits than its factorization.

81714165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419068.

The product of its digits is 6720, while the sum is 33.

The square root of 81714165 is about 9039.5887627701. The cubic root of 81714165 is about 433.9427621713.

The spelling of 81714165 in words is "eighty-one million, seven hundred fourteen thousand, one hundred sixty-five".