212175065 has 4 divisors (see below), whose sum is σ = 254610084. Its totient is φ = 169740048.

The previous prime is 212175053. The next prime is 212175077. The reversal of 212175065 is 560571212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (212175053) and next prime (212175077).

It can be written as a sum of positive squares in 2 ways, for example, as 104264521 + 107910544 = 10211^2 + 10388^2 .

It is a cyclic number.

It is not a de Polignac number, because 212175065 - 2⁶ = 212175001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21217502 + ... + 21217511.

It is an arithmetic number, because the mean of its divisors is an integer number (63652521).

Almost surely, 2^212175065 is an apocalyptic number.

It is an amenable number.

212175065 is a deficient number, since it is larger than the sum of its proper divisors (42435019).

212175065 is an equidigital number, since it uses as much as digits as its factorization.

212175065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42435018.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 212175065 is about 14566.2302947605. The cubic root of 212175065 is about 596.4372804392.

The spelling of 212175065 in words is "two hundred twelve million, one hundred seventy-five thousand, sixty-five".