44253531221 has 4 divisors (see below), whose sum is σ = 44261928972. Its totient is φ = 44245133472.

The previous prime is 44253531089. The next prime is 44253531241. The reversal of 44253531221 is 12213535244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35528103121 + 8725428100 = 188489^2 + 93410^2 .

It is a cyclic number.

It is not a de Polignac number, because 44253531221 - 2²² = 44249336917 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 (44253531241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4190966 + ... + 4201511.

It is an arithmetic number, because the mean of its divisors is an integer number (11065482243).

Almost surely, 2^44253531221 is an apocalyptic number.

It is an amenable number.

44253531221 is a deficient number, since it is larger than the sum of its proper divisors (8397751).

44253531221 is an equidigital number, since it uses as much as digits as its factorization.

44253531221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8397750.

The product of its digits is 28800, while the sum is 32.

The spelling of 44253531221 in words is "forty-four billion, two hundred fifty-three million, five hundred thirty-one thousand, two hundred twenty-one".