44172021 has 8 divisors (see below), whose sum is σ = 59346144. Its totient is φ = 29222960.

The previous prime is 44172013. The next prime is 44172031. The reversal of 44172021 is 12027144.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44172021 - 2³ = 44172013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44172031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55806 + ... + 56591.

It is an arithmetic number, because the mean of its divisors is an integer number (7418268).

Almost surely, 2^44172021 is an apocalyptic number.

It is an amenable number.

44172021 is a deficient number, since it is larger than the sum of its proper divisors (15174123).

44172021 is a wasteful number, since it uses less digits than its factorization.

44172021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112531.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 44172021 is about 6646.2035027525. The cubic root of 44172021 is about 353.4943065222.

Adding to 44172021 its reverse (12027144), we get a palindrome (56199165).

The spelling of 44172021 in words is "forty-four million, one hundred seventy-two thousand, twenty-one".