212506563 has 4 divisors (see below), whose sum is σ = 283342088. Its totient is φ = 141671040.

The previous prime is 212506561. The next prime is 212506597. The reversal of 212506563 is 365605212.

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

It is not a de Polignac number, because 212506563 - 2¹ = 212506561 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 212506563.

It is not an unprimeable number, because it can be changed into a prime (212506561) 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, 35417758 + ... + 35417763.

It is an arithmetic number, because the mean of its divisors is an integer number (70835522).

Almost surely, 2^212506563 is an apocalyptic number.

212506563 is a deficient number, since it is larger than the sum of its proper divisors (70835525).

212506563 is an equidigital number, since it uses as much as digits as its factorization.

212506563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70835524.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 212506563 is about 14577.6048444180. The cubic root of 212506563 is about 596.7477392967.

The spelling of 212506563 in words is "two hundred twelve million, five hundred six thousand, five hundred sixty-three".