210553361 has 2 divisors, whose sum is σ = 210553362. Its totient is φ = 210553360.

The previous prime is 210553351. The next prime is 210553367. The reversal of 210553361 is 163355012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201214225 + 9339136 = 14185^2 + 3056^2 .

It is a cyclic number.

It is not a de Polignac number, because 210553361 - 2⁶ = 210553297 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210553361.

It is not a weakly prime, because it can be changed into another prime (210553367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105276680 + 105276681.

It is an arithmetic number, because the mean of its divisors is an integer number (105276681).

Almost surely, 2^210553361 is an apocalyptic number.

It is an amenable number.

210553361 is a deficient number, since it is larger than the sum of its proper divisors (1).

210553361 is an equidigital number, since it uses as much as digits as its factorization.

210553361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 210553361 is about 14510.4569535215. The cubic root of 210553361 is about 594.9138222293.

The spelling of 210553361 in words is "two hundred ten million, five hundred fifty-three thousand, three hundred sixty-one".