81547014 has 16 divisors (see below), whose sum is σ = 168718320. Its totient is φ = 26244960.

The previous prime is 81547013. The next prime is 81547061. The reversal of 81547014 is 41074518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81547013) 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 7 ways as a sum of consecutive naturals, for example, 234157 + ... + 234504.

It is an arithmetic number, because the mean of its divisors is an integer number (10544895).

Almost surely, 2^81547014 is an apocalyptic number.

81547014 is an abundant number, since it is smaller than the sum of its proper divisors (87171306).

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

81547014 is a wasteful number, since it uses less digits than its factorization.

81547014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468695.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 81547014 is about 9030.3385318603. The cubic root of 81547014 is about 433.6466752755.

The spelling of 81547014 in words is "eighty-one million, five hundred forty-seven thousand, fourteen".