81441371 has 16 divisors (see below), whose sum is σ = 92184576. Its totient is φ = 71280000.

The previous prime is 81441361. The next prime is 81441383. The reversal of 81441371 is 17314418.

It is a de Polignac number, because none of the positive numbers 2^k-81441371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81441361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81686 + ... + 82676.

It is an arithmetic number, because the mean of its divisors is an integer number (5761536).

Almost surely, 2^81441371 is an apocalyptic number.

81441371 is a deficient number, since it is larger than the sum of its proper divisors (10743205).

81441371 is a wasteful number, since it uses less digits than its factorization.

81441371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274.

The product of its digits is 2688, while the sum is 29.

The square root of 81441371 is about 9024.4872984564. The cubic root of 81441371 is about 433.4593333135.

Adding to 81441371 its reverse (17314418), we get a palindrome (98755789).

The spelling of 81441371 in words is "eighty-one million, four hundred forty-one thousand, three hundred seventy-one".