210853 has 2 divisors, whose sum is σ = 210854. Its totient is φ = 210852.

The previous prime is 210839. The next prime is 210857. The reversal of 210853 is 358012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209764 + 1089 = 458^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 210853 - 2¹³ = 202661 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 210853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210857) 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, 105426 + 105427.

It is an arithmetic number, because the mean of its divisors is an integer number (105427).

2²¹⁰⁸⁵³ is an apocalyptic number.

It is an amenable number.

210853 is a deficient number, since it is larger than the sum of its proper divisors (1).

210853 is an equidigital number, since it uses as much as digits as its factorization.

210853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 210853 is about 459.1873256091. The cubic root of 210853 is about 59.5195896234.

Adding to 210853 its reverse (358012), we get a palindrome (568865).

The spelling of 210853 in words is "two hundred ten thousand, eight hundred fifty-three".