212135613 has 16 divisors (see below), whose sum is σ = 288374400. Its totient is φ = 138674880.

The previous prime is 212135587. The next prime is 212135629. The reversal of 212135613 is 316531212.

It is not a de Polignac number, because 212135613 - 2⁹ = 212135101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212135213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64083 + ... + 67311.

It is an arithmetic number, because the mean of its divisors is an integer number (18023400).

Almost surely, 2^212135613 is an apocalyptic number.

It is an amenable number.

212135613 is a deficient number, since it is larger than the sum of its proper divisors (76238787).

212135613 is a wasteful number, since it uses less digits than its factorization.

212135613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652.

The product of its digits is 1080, while the sum is 24.

The square root of 212135613 is about 14564.8760035917. The cubic root of 212135613 is about 596.4003108072.

Adding to 212135613 its reverse (316531212), we get a palindrome (528666825).

The spelling of 212135613 in words is "two hundred twelve million, one hundred thirty-five thousand, six hundred thirteen".