44435581 has 2 divisors, whose sum is σ = 44435582. Its totient is φ = 44435580.

The previous prime is 44435579. The next prime is 44435591. The reversal of 44435581 is 18553444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44435556 + 25 = 6666^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 44435581 - 2¹ = 44435579 is a prime.

It is a super-2 number, since 2×44435581² = 3949041717615122, which contains 22 as substring.

Together with 44435579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44435591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22217790 + 22217791.

It is an arithmetic number, because the mean of its divisors is an integer number (22217791).

Almost surely, 2^44435581 is an apocalyptic number.

It is an amenable number.

44435581 is a deficient number, since it is larger than the sum of its proper divisors (1).

44435581 is an equidigital number, since it uses as much as digits as its factorization.

44435581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 34.

The square root of 44435581 is about 6666.0018751873. The cubic root of 44435581 is about 354.1959744574.

The spelling of 44435581 in words is "forty-four million, four hundred thirty-five thousand, five hundred eighty-one".