5621005521 has 12 divisors (see below), whose sum is σ = 8137986948. Its totient is φ = 3738680064.

The previous prime is 5621005513. The next prime is 5621005573. The reversal of 5621005521 is 1255001265.

5621005521 is a `hidden beast` number, since 5 + 6 + 2 + 100 + 552 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 687488400 + 4933517121 = 26220^2 + 70239^2 .

It is not a de Polignac number, because 5621005521 - 2³ = 5621005513 is a prime.

It is a super-2 number, since 2×5621005521² = 63191406134224962882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5621005721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717300 + ... + 725093.

It is an arithmetic number, because the mean of its divisors is an integer number (678165579).

Almost surely, 2^5621005521 is an apocalyptic number.

It is an amenable number.

5621005521 is a deficient number, since it is larger than the sum of its proper divisors (2516981427).

5621005521 is a wasteful number, since it uses less digits than its factorization.

5621005521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442832 (or 1442829 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 5621005521 is about 74973.3654106577. The cubic root of 5621005521 is about 1778.0255766866.

Adding to 5621005521 its reverse (1255001265), we get a palindrome (6876006786).

The spelling of 5621005521 in words is "five billion, six hundred twenty-one million, five thousand, five hundred twenty-one".