212506613 has 36 divisors (see below), whose sum is σ = 254785440. Its totient is φ = 177006720.

The previous prime is 212506597. The next prime is 212506661. The reversal of 212506613 is 316605212.

It is not a de Polignac number, because 212506613 - 2⁴ = 212506597 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 (212506213) 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 35 ways as a sum of consecutive naturals, for example, 2063120 + ... + 2063222.

Almost surely, 2^212506613 is an apocalyptic number.

It is an amenable number.

212506613 is a deficient number, since it is larger than the sum of its proper divisors (42278827).

212506613 is a wasteful number, since it uses less digits than its factorization.

212506613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 212506613 is about 14577.6065593773. The cubic root of 212506613 is about 596.7477860989.

The spelling of 212506613 in words is "two hundred twelve million, five hundred six thousand, six hundred thirteen".