44545621 has 4 divisors (see below), whose sum is σ = 44560044. Its totient is φ = 44531200.

The previous prime is 44545619. The next prime is 44545637. The reversal of 44545621 is 12654544.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12215025 + 32330596 = 3495^2 + 5686^2 .

It is a cyclic number.

It is not a de Polignac number, because 44545621 - 2¹ = 44545619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44545681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490 + ... + 9451.

It is an arithmetic number, because the mean of its divisors is an integer number (11140011).

Almost surely, 2^44545621 is an apocalyptic number.

It is an amenable number.

44545621 is a deficient number, since it is larger than the sum of its proper divisors (14423).

44545621 is an equidigital number, since it uses as much as digits as its factorization.

44545621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14422.

The product of its digits is 19200, while the sum is 31.

The square root of 44545621 is about 6674.2505946361. The cubic root of 44545621 is about 354.4881096882.

The spelling of 44545621 in words is "forty-four million, five hundred forty-five thousand, six hundred twenty-one".