212756017 has 6 divisors (see below), whose sum is σ = 215094614. Its totient is φ = 210420480.

The previous prime is 212755997. The next prime is 212756023. The reversal of 212756017 is 710657212.

212756017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 17986081 + 194769936 = 4241^2 + 13956^2 .

It is not a de Polignac number, because 212756017 - 2¹¹ = 212753969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212756017.

It is not an unprimeable number, because it can be changed into a prime (212756087) 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, 142917 + ... + 144397.

Almost surely, 2^212756017 is an apocalyptic number.

It is an amenable number.

212756017 is a deficient number, since it is larger than the sum of its proper divisors (2338597).

212756017 is an frugal number, since it uses more digits than its factorization.

212756017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 212756017 is about 14586.1584044600. The cubic root of 212756017 is about 596.9811484030.

The spelling of 212756017 in words is "two hundred twelve million, seven hundred fifty-six thousand, seventeen".