212554712809 has 16 divisors (see below), whose sum is σ = 224499363840. Its totient is φ = 200970856080.

The previous prime is 212554712771. The next prime is 212554712837. The reversal of 212554712809 is 908217455212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212554712809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212554712879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58357 + ... + 654610.

It is an arithmetic number, because the mean of its divisors is an integer number (14031210240).

Almost surely, 2^212554712809 is an apocalyptic number.

It is an amenable number.

212554712809 is a deficient number, since it is larger than the sum of its proper divisors (11944651031).

212554712809 is a wasteful number, since it uses less digits than its factorization.

212554712809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713220.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 212554712809 in words is "two hundred twelve billion, five hundred fifty-four million, seven hundred twelve thousand, eight hundred nine".