4400521521 has 8 divisors (see below), whose sum is σ = 6400758624. Its totient is φ = 2666982720.

The previous prime is 4400521511. The next prime is 4400521547. The reversal of 4400521521 is 1251250044.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4400521521 - 2¹³ = 4400513329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4400521491 and 4400521500.

It is not an unprimeable number, because it can be changed into a prime (4400521511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66674536 + ... + 66674601.

It is an arithmetic number, because the mean of its divisors is an integer number (800094828).

Almost surely, 2^4400521521 is an apocalyptic number.

It is an amenable number.

4400521521 is a deficient number, since it is larger than the sum of its proper divisors (2000237103).

4400521521 is a wasteful number, since it uses less digits than its factorization.

4400521521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133349151.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 4400521521 is about 66336.4268030771. The cubic root of 4400521521 is about 1638.7072800448.

Adding to 4400521521 its reverse (1251250044), we get a palindrome (5651771565).

The spelling of 4400521521 in words is "four billion, four hundred million, five hundred twenty-one thousand, five hundred twenty-one".