210135013 has 6 divisors (see below), whose sum is σ = 230974982. Its totient is φ = 191031720.

The previous prime is 210135007. The next prime is 210135043. The reversal of 210135013 is 310531012.

It can be written as a sum of positive squares in only one way, i.e., 175112289 + 35022724 = 13233^2 + 5918^2 .

It is a de Polignac number, because none of the positive numbers 2^k-210135013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210135043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 868206 + ... + 868447.

Almost surely, 2^210135013 is an apocalyptic number.

It is an amenable number.

210135013 is a deficient number, since it is larger than the sum of its proper divisors (20839969).

210135013 is a wasteful number, since it uses less digits than its factorization.

210135013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736675 (or 1736664 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 210135013 is about 14496.0343887561. The cubic root of 210135013 is about 594.5195500086.

Adding to 210135013 its reverse (310531012), we get a palindrome (520666025).

The spelling of 210135013 in words is "two hundred ten million, one hundred thirty-five thousand, thirteen".