212075517 has 4 divisors (see below), whose sum is σ = 282767360. Its totient is φ = 141383676.

The previous prime is 212075483. The next prime is 212075537. The reversal of 212075517 is 715570212.

212075517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212075517 - 2⁸ = 212075261 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 (212075537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35345917 + ... + 35345922.

It is an arithmetic number, because the mean of its divisors is an integer number (70691840).

Almost surely, 2^212075517 is an apocalyptic number.

It is an amenable number.

212075517 is a deficient number, since it is larger than the sum of its proper divisors (70691843).

212075517 is an equidigital number, since it uses as much as digits as its factorization.

212075517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70691842.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 212075517 is about 14562.8128120909. The cubic root of 212075517 is about 596.3439873111.

The spelling of 212075517 in words is "two hundred twelve million, seventy-five thousand, five hundred seventeen".