212126563 has 16 divisors (see below), whose sum is σ = 234772992. Its totient is φ = 190060000.

The previous prime is 212126533. The next prime is 212126581. The reversal of 212126563 is 365621212.

212126563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212126563 - 2⁵ = 212126531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212126533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478620 + ... + 479062.

It is an arithmetic number, because the mean of its divisors is an integer number (14673312).

Almost surely, 2^212126563 is an apocalyptic number.

212126563 is a deficient number, since it is larger than the sum of its proper divisors (22646429).

212126563 is a wasteful number, since it uses less digits than its factorization.

212126563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its digits is 4320, while the sum is 28.

The square root of 212126563 is about 14564.5653213544. The cubic root of 212126563 is about 596.3918295980.

Adding to 212126563 its reverse (365621212), we get a palindrome (577747775).

The spelling of 212126563 in words is "two hundred twelve million, one hundred twenty-six thousand, five hundred sixty-three".