81014441 has 4 divisors (see below), whose sum is σ = 84536832. Its totient is φ = 77492052.

The previous prime is 81014413. The next prime is 81014447. The reversal of 81014441 is 14441018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81014441 is a prime.

It is a super-3 number, since 3×81014441³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 3522367 = 81014441 / (8 + 1 + 0 + 1 + 4 + 4 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81014447) 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 3 ways as a sum of consecutive naturals, for example, 1761161 + ... + 1761206.

It is an arithmetic number, because the mean of its divisors is an integer number (21134208).

Almost surely, 2^81014441 is an apocalyptic number.

It is an amenable number.

81014441 is a deficient number, since it is larger than the sum of its proper divisors (3522391).

81014441 is a wasteful number, since it uses less digits than its factorization.

81014441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522390.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 81014441 is about 9000.8022420227. The cubic root of 81014441 is about 432.7005825594.

Adding to 81014441 its reverse (14441018), we get a palindrome (95455459).

It can be divided in two parts, 810 and 14441, that added together give a palindrome (15251).

The spelling of 81014441 in words is "eighty-one million, fourteen thousand, four hundred forty-one".