44421165 has 48 divisors (see below), whose sum is σ = 81139968. Its totient is φ = 22437888.

The previous prime is 44421161. The next prime is 44421253. The reversal of 44421165 is 56112444.

44421165 is a `hidden beast` number, since 444 + 211 + 6 + 5 = 666.

It is not a de Polignac number, because 44421165 - 2² = 44421161 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44421161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 172717 + ... + 172973.

It is an arithmetic number, because the mean of its divisors is an integer number (1690416).

Almost surely, 2^44421165 is an apocalyptic number.

44421165 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

44421165 is a deficient number, since it is larger than the sum of its proper divisors (36718803).

44421165 is a wasteful number, since it uses less digits than its factorization.

44421165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 455 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 44421165 is about 6664.9204796456. The cubic root of 44421165 is about 354.1576670070.

It can be divided in two parts, 444 and 21165, that added together give a square (21609 = 147²).

The spelling of 44421165 in words is "forty-four million, four hundred twenty-one thousand, one hundred sixty-five".