5651000221 has 4 divisors (see below), whose sum is σ = 5651891100. Its totient is φ = 5650109344.

The previous prime is 5651000161. The next prime is 5651000227. The reversal of 5651000221 is 1220001565.

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 1535777721 + 4115222500 = 39189^2 + 64150^2 .

It is a cyclic number.

It is not a de Polignac number, because 5651000221 - 2⁷ = 5651000093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5651000192 and 5651000201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5651000227) 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, 435856 + ... + 448633.

It is an arithmetic number, because the mean of its divisors is an integer number (1412972775).

Almost surely, 2^5651000221 is an apocalyptic number.

It is an amenable number.

5651000221 is a deficient number, since it is larger than the sum of its proper divisors (890879).

5651000221 is an equidigital number, since it uses as much as digits as its factorization.

5651000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890878.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 5651000221 is about 75173.1349685511. The cubic root of 5651000221 is about 1781.1825896623.

Adding to 5651000221 its reverse (1220001565), we get a palindrome (6871001786).

The spelling of 5651000221 in words is "five billion, six hundred fifty-one million, two hundred twenty-one", and thus it is an aban number.