212664563 has 4 divisors (see below), whose sum is σ = 213200640. Its totient is φ = 212128488.

The previous prime is 212664553. The next prime is 212664589. The reversal of 212664563 is 365466212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212664563 - 2⁴ = 212664547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212664503) by changing a digit.

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, 267443 + ... + 268236.

It is an arithmetic number, because the mean of its divisors is an integer number (53300160).

Almost surely, 2^212664563 is an apocalyptic number.

212664563 is a deficient number, since it is larger than the sum of its proper divisors (536077).

212664563 is an equidigital number, since it uses as much as digits as its factorization.

212664563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536076.

The product of its digits is 51840, while the sum is 35.

The square root of 212664563 is about 14583.0231090813. The cubic root of 212664563 is about 596.8955979222.

The spelling of 212664563 in words is "two hundred twelve million, six hundred sixty-four thousand, five hundred sixty-three".