45570221 has 2 divisors, whose sum is σ = 45570222. Its totient is φ = 45570220.

The previous prime is 45570209. The next prime is 45570241. The reversal of 45570221 is 12207554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45024100 + 546121 = 6710^2 + 739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45570221 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 (45570241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22785110 + 22785111.

It is an arithmetic number, because the mean of its divisors is an integer number (22785111).

Almost surely, 2^45570221 is an apocalyptic number.

It is an amenable number.

45570221 is a deficient number, since it is larger than the sum of its proper divisors (1).

45570221 is an equidigital number, since it uses as much as digits as its factorization.

45570221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 45570221 is about 6750.5719016984. The cubic root of 45570221 is about 357.1854105715.

Adding to 45570221 its reverse (12207554), we get a palindrome (57777775).

The spelling of 45570221 in words is "forty-five million, five hundred seventy thousand, two hundred twenty-one".