81541414 has 16 divisors (see below), whose sum is σ = 125858736. Its totient is φ = 39592800.

The previous prime is 81541409. The next prime is 81541429. The reversal of 81541414 is 41414518.

It is a congruent number.

It is an unprimeable number.

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, 69049 + ... + 70219.

It is an arithmetic number, because the mean of its divisors is an integer number (7866171).

Almost surely, 2^81541414 is an apocalyptic number.

81541414 is a deficient number, since it is larger than the sum of its proper divisors (44317322).

81541414 is a wasteful number, since it uses less digits than its factorization.

81541414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151.

The product of its digits is 2560, while the sum is 28.

The square root of 81541414 is about 9030.0284606417. The cubic root of 81541414 is about 433.6367485806.

The spelling of 81541414 in words is "eighty-one million, five hundred forty-one thousand, four hundred fourteen".