212800217389 has 4 divisors (see below), whose sum is σ = 212831141056. Its totient is φ = 212769293724.

The previous prime is 212800217369. The next prime is 212800217393. The reversal of 212800217389 is 983712008212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212800217389 - 2¹⁹ = 212799693101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212800217359) 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, 15451509 + ... + 15465274.

It is an arithmetic number, because the mean of its divisors is an integer number (53207785264).

Almost surely, 2^212800217389 is an apocalyptic number.

It is an amenable number.

212800217389 is a deficient number, since it is larger than the sum of its proper divisors (30923667).

212800217389 is an equidigital number, since it uses as much as digits as its factorization.

212800217389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30923666.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 212800217389 in words is "two hundred twelve billion, eight hundred million, two hundred seventeen thousand, three hundred eighty-nine".