210135505 has 16 divisors (see below), whose sum is σ = 257122944. Its totient is φ = 164828160.

The previous prime is 210135503. The next prime is 210135557. The reversal of 210135505 is 505531012.

It is not a de Polignac number, because 210135505 - 2¹ = 210135503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210135503) 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 15 ways as a sum of consecutive naturals, for example, 66982 + ... + 70048.

It is an arithmetic number, because the mean of its divisors is an integer number (16070184).

Almost surely, 2^210135505 is an apocalyptic number.

It is an amenable number.

210135505 is a deficient number, since it is larger than the sum of its proper divisors (46987439).

210135505 is a wasteful number, since it uses less digits than its factorization.

210135505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 210135505 is about 14496.0513589046. The cubic root of 210135505 is about 594.5200140014.

Adding to 210135505 its reverse (505531012), we get a palindrome (715666517).

The spelling of 210135505 in words is "two hundred ten million, one hundred thirty-five thousand, five hundred five".