210342253 has 4 divisors (see below), whose sum is σ = 229464288. Its totient is φ = 191220220.

The previous prime is 210342247. The next prime is 210342271. The reversal of 210342253 is 352243012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210342253 - 2⁵ = 210342221 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210342203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9561001 + ... + 9561022.

It is an arithmetic number, because the mean of its divisors is an integer number (57366072).

Almost surely, 2^210342253 is an apocalyptic number.

It is an amenable number.

210342253 is a deficient number, since it is larger than the sum of its proper divisors (19122035).

210342253 is a wasteful number, since it uses less digits than its factorization.

210342253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19122034.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 210342253 is about 14503.1807890545. The cubic root of 210342253 is about 594.7149287612.

Adding to 210342253 its reverse (352243012), we get a palindrome (562585265).

The spelling of 210342253 in words is "two hundred ten million, three hundred forty-two thousand, two hundred fifty-three".