675528221 has 2 divisors, whose sum is σ = 675528222. Its totient is φ = 675528220.

The previous prime is 675528211. The next prime is 675528241. The reversal of 675528221 is 122825576.

675528221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662496121 + 13032100 = 25739^2 + 3610^2 .

It is a cyclic number.

It is not a de Polignac number, because 675528221 - 2⁶ = 675528157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (675528211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337764110 + 337764111.

It is an arithmetic number, because the mean of its divisors is an integer number (337764111).

Almost surely, 2^675528221 is an apocalyptic number.

It is an amenable number.

675528221 is a deficient number, since it is larger than the sum of its proper divisors (1).

675528221 is an equidigital number, since it uses as much as digits as its factorization.

675528221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 38.

The square root of 675528221 is about 25990.9257434205. The cubic root of 675528221 is about 877.4340807022.

The spelling of 675528221 in words is "six hundred seventy-five million, five hundred twenty-eight thousand, two hundred twenty-one".