210075221 has 2 divisors, whose sum is σ = 210075222. Its totient is φ = 210075220.

The previous prime is 210075209. The next prime is 210075247. The reversal of 210075221 is 122570012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110355025 + 99720196 = 10505^2 + 9986^2 .

It is a cyclic number.

It is not a de Polignac number, because 210075221 - 2⁶ = 210075157 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 210075193 and 210075202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210075821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105037610 + 105037611.

It is an arithmetic number, because the mean of its divisors is an integer number (105037611).

Almost surely, 2^210075221 is an apocalyptic number.

It is an amenable number.

210075221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210075221 is an equidigital number, since it uses as much as digits as its factorization.

210075221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 210075221 is about 14493.9718848906. The cubic root of 210075221 is about 594.4631562890.

The spelling of 210075221 in words is "two hundred ten million, seventy-five thousand, two hundred twenty-one".