4445130552221 has 4 divisors (see below), whose sum is σ = 4446719804412. Its totient is φ = 4443541300032.

The previous prime is 4445130552211. The next prime is 4445130552329. The reversal of 4445130552221 is 1222550315444.

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 3233303863321 + 1211826688900 = 1798139^2 + 1100830^2 .

It is a cyclic number.

It is not a de Polignac number, because 4445130552221 - 2²⁶ = 4445063443357 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 (4445130552211) 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, 794621900 + ... + 794627493.

It is an arithmetic number, because the mean of its divisors is an integer number (1111679951103).

Almost surely, 2^{4445130552221} is an apocalyptic number.

It is an amenable number.

4445130552221 is a deficient number, since it is larger than the sum of its proper divisors (1589252191).

4445130552221 is a wasteful number, since it uses less digits than its factorization.

4445130552221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589252190.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 4445130552221 its reverse (1222550315444), we get a palindrome (5667680867665).

The spelling of 4445130552221 in words is "four trillion, four hundred forty-five billion, one hundred thirty million, five hundred fifty-two thousand, two hundred twenty-one".