6632221 has 2 divisors, whose sum is σ = 6632222. Its totient is φ = 6632220.

The previous prime is 6632207. The next prime is 6632231. The reversal of 6632221 is 1222366.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4056196 + 2576025 = 2014^2 + 1605^2 .

It is a cyclic number.

It is not a de Polignac number, because 6632221 - 2¹⁷ = 6501149 is a prime.

It is equal to p₄₅₃₂₁₇ and since 6632221 and 453217 have the same sum of digits, it is a Honaker prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6632192 and 6632201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6632231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3316110 + 3316111.

It is an arithmetic number, because the mean of its divisors is an integer number (3316111).

Almost surely, 2^6632221 is an apocalyptic number.

It is an amenable number.

6632221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6632221 is an equidigital number, since it uses as much as digits as its factorization.

6632221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 6632221 is about 2575.3098842664. The cubic root of 6632221 is about 187.8824997630.

Adding to 6632221 its reverse (1222366), we get a palindrome (7854587).

The spelling of 6632221 in words is "six million, six hundred thirty-two thousand, two hundred twenty-one".