44321621 has 16 divisors (see below), whose sum is σ = 47713536. Its totient is φ = 41074176.

The previous prime is 44321581. The next prime is 44321687. The reversal of 44321621 is 12612344.

It is a cyclic number.

It is not a de Polignac number, because 44321621 - 2¹⁴ = 44305237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44321521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125381 + ... + 125733.

It is an arithmetic number, because the mean of its divisors is an integer number (2982096).

Almost surely, 2^44321621 is an apocalyptic number.

It is an amenable number.

44321621 is a deficient number, since it is larger than the sum of its proper divisors (3391915).

44321621 is a wasteful number, since it uses less digits than its factorization.

44321621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

The product of its digits is 1152, while the sum is 23.

The square root of 44321621 is about 6657.4485352874. The cubic root of 44321621 is about 353.8929235559.

Adding to 44321621 its reverse (12612344), we get a palindrome (56933965).

The spelling of 44321621 in words is "forty-four million, three hundred twenty-one thousand, six hundred twenty-one".