5661021224 has 8 divisors (see below), whose sum is σ = 10614414810. Its totient is φ = 2830510608.

The previous prime is 5661021161. The next prime is 5661021227. The reversal of 5661021224 is 4221201665.

It can be written as a sum of positive squares in only one way, i.e., 4486588324 + 1174432900 = 66982^2 + 34270^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×5661021224² = 64094322597156916352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5661021227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353813819 + ... + 353813834.

Almost surely, 2^5661021224 is an apocalyptic number.

It is an amenable number.

5661021224 is a deficient number, since it is larger than the sum of its proper divisors (4953393586).

5661021224 is a wasteful number, since it uses less digits than its factorization.

5661021224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707627659 (or 707627655 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 5661021224 is about 75239.7582664910. The cubic root of 5661021224 is about 1782.2348338071.

Adding to 5661021224 its reverse (4221201665), we get a palindrome (9882222889).

The spelling of 5661021224 in words is "five billion, six hundred sixty-one million, twenty-one thousand, two hundred twenty-four".