44113581 has 12 divisors (see below), whose sum is σ = 65274300. Its totient is φ = 28691520.

The previous prime is 44113547. The next prime is 44113621. The reversal of 44113581 is 18531144.

It is a happy number.

44113581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11964681 + 32148900 = 3459^2 + 5670^2 .

It is not a de Polignac number, because 44113581 - 2¹¹ = 44111533 is a prime.

It is a super-2 number, since 2×44113581² = 3892016057287122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44113541) 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 11 ways as a sum of consecutive naturals, for example, 59406 + ... + 60143.

It is an arithmetic number, because the mean of its divisors is an integer number (5439525).

Almost surely, 2^44113581 is an apocalyptic number.

44113581 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

44113581 is a deficient number, since it is larger than the sum of its proper divisors (21160719).

44113581 is a wasteful number, since it uses less digits than its factorization.

44113581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119596 (or 119593 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 44113581 is about 6641.8055527093. The cubic root of 44113581 is about 353.3383456233.

The spelling of 44113581 in words is "forty-four million, one hundred thirteen thousand, five hundred eighty-one".