81714015 has 40 divisors (see below), whose sum is σ = 148191120. Its totient is φ = 43072128.

The previous prime is 81714013. The next prime is 81714067. The reversal of 81714015 is 51041718.

It is not a de Polignac number, because 81714015 - 2¹ = 81714013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 81714015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81714011) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 34912 + ... + 37178.

It is an arithmetic number, because the mean of its divisors is an integer number (3704778).

Almost surely, 2^81714015 is an apocalyptic number.

81714015 is a deficient number, since it is larger than the sum of its proper divisors (66477105).

81714015 is a wasteful number, since it uses less digits than its factorization.

81714015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 81714015 is about 9039.5804659287. The cubic root of 81714015 is about 433.9424966463.

The spelling of 81714015 in words is "eighty-one million, seven hundred fourteen thousand, fifteen".