44535781 has 2 divisors, whose sum is σ = 44535782. Its totient is φ = 44535780.

The previous prime is 44535773. The next prime is 44535833. The reversal of 44535781 is 18753544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37822500 + 6713281 = 6150^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 44535781 - 2³ = 44535773 is a prime.

It is a super-2 number, since 2×44535781² = 3966871578559922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44535781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44535731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22267890 + 22267891.

It is an arithmetic number, because the mean of its divisors is an integer number (22267891).

Almost surely, 2^44535781 is an apocalyptic number.

It is an amenable number.

44535781 is a deficient number, since it is larger than the sum of its proper divisors (1).

44535781 is an equidigital number, since it uses as much as digits as its factorization.

44535781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 37.

The square root of 44535781 is about 6673.5133925092. The cubic root of 44535781 is about 354.4620059636.

The spelling of 44535781 in words is "forty-four million, five hundred thirty-five thousand, seven hundred eighty-one".