45636221 has 2 divisors, whose sum is σ = 45636222. Its totient is φ = 45636220.

The previous prime is 45636191. The next prime is 45636299. The reversal of 45636221 is 12263654.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44222500 + 1413721 = 6650^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 45636221 - 2¹⁴ = 45619837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45636421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22818110 + 22818111.

It is an arithmetic number, because the mean of its divisors is an integer number (22818111).

Almost surely, 2^45636221 is an apocalyptic number.

It is an amenable number.

45636221 is a deficient number, since it is larger than the sum of its proper divisors (1).

45636221 is an equidigital number, since it uses as much as digits as its factorization.

45636221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 45636221 is about 6755.4586076742. The cubic root of 45636221 is about 357.3577662953.

Adding to 45636221 its reverse (12263654), we get a palindrome (57899875).

The spelling of 45636221 in words is "forty-five million, six hundred thirty-six thousand, two hundred twenty-one".