212047065 has 20 divisors (see below), whose sum is σ = 380114724. Its totient is φ = 113091552.

The previous prime is 212047021. The next prime is 212047067. The reversal of 212047065 is 560740212.

212047065 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 2 ways, for example, as 59351616 + 152695449 = 7704^2 + 12357^2 .

It is not a de Polignac number, because 212047065 - 2⁷ = 212046937 is a prime.

It is a super-2 number, since 2×212047065² = 89927915550228450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212047067) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 261382 + ... + 262191.

Almost surely, 2^212047065 is an apocalyptic number.

It is an amenable number.

212047065 is a deficient number, since it is larger than the sum of its proper divisors (168067659).

212047065 is an equidigital number, since it uses as much as digits as its factorization.

212047065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523590 (or 523581 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 212047065 is about 14561.8359076045. The cubic root of 212047065 is about 596.3173176635.

Adding to 212047065 its reverse (560740212), we get a palindrome (772787277).

The spelling of 212047065 in words is "two hundred twelve million, forty-seven thousand, sixty-five".