210135243 has 8 divisors (see below), whose sum is σ = 280295488. Its totient is φ = 140032584.

The previous prime is 210135241. The next prime is 210135251. The reversal of 210135243 is 342531012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210135243 - 2¹ = 210135241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210135241) 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 7 ways as a sum of consecutive naturals, for example, 5005 + ... + 21102.

It is an arithmetic number, because the mean of its divisors is an integer number (35036936).

Almost surely, 2^210135243 is an apocalyptic number.

210135243 is a deficient number, since it is larger than the sum of its proper divisors (70160245).

210135243 is a wasteful number, since it uses less digits than its factorization.

210135243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28793.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 210135243 is about 14496.0423219581. The cubic root of 210135243 is about 594.5197669159.

Adding to 210135243 its reverse (342531012), we get a palindrome (552666255).

The spelling of 210135243 in words is "two hundred ten million, one hundred thirty-five thousand, two hundred forty-three".