81414441 has 12 divisors (see below), whose sum is σ = 118921140. Its totient is φ = 53665920.

The previous prime is 81414433. The next prime is 81414461. The reversal of 81414441 is 14441418.

It can be written as a sum of positive squares in 2 ways, for example, as 7952400 + 73462041 = 2820^2 + 8571^2 .

It is not a de Polignac number, because 81414441 - 2³ = 81414433 is a prime.

It is a super-2 number, since 2×81414441² = 13256622406684962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81414461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50020 + ... + 51621.

It is an arithmetic number, because the mean of its divisors is an integer number (9910095).

Almost surely, 2^81414441 is an apocalyptic number.

It is an amenable number.

81414441 is a deficient number, since it is larger than the sum of its proper divisors (37506699).

81414441 is a wasteful number, since it uses less digits than its factorization.

81414441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101736 (or 101733 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 81414441 is about 9022.9951235718. The cubic root of 81414441 is about 433.4115511009.

Adding to 81414441 its reverse (14441418), we get a palindrome (95855859).

The spelling of 81414441 in words is "eighty-one million, four hundred fourteen thousand, four hundred forty-one".