44545021 has 4 divisors (see below), whose sum is σ = 45081792. Its totient is φ = 44008252.

The previous prime is 44545009. The next prime is 44545031. The reversal of 44545021 is 12054544.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44545021 - 2⁷ = 44544893 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 (44545001) 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, 268261 + ... + 268426.

It is an arithmetic number, because the mean of its divisors is an integer number (11270448).

Almost surely, 2^44545021 is an apocalyptic number.

It is an amenable number.

44545021 is a deficient number, since it is larger than the sum of its proper divisors (536771).

44545021 is an equidigital number, since it uses as much as digits as its factorization.

44545021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536770.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 44545021 is about 6674.2056456181. The cubic root of 44545021 is about 354.4865181078.

Adding to 44545021 its reverse (12054544), we get a palindrome (56599565).

The spelling of 44545021 in words is "forty-four million, five hundred forty-five thousand, twenty-one".