212644362243 has 4 divisors (see below), whose sum is σ = 283525816328. Its totient is φ = 141762908160.

The previous prime is 212644362197. The next prime is 212644362257. The reversal of 212644362243 is 342263446212.

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

It is not a de Polignac number, because 212644362243 - 2¹⁸ = 212644100099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212644362443) 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, 35440727038 + ... + 35440727043.

It is an arithmetic number, because the mean of its divisors is an integer number (70881454082).

Almost surely, 2^212644362243 is an apocalyptic number.

212644362243 is a deficient number, since it is larger than the sum of its proper divisors (70881454085).

212644362243 is an equidigital number, since it uses as much as digits as its factorization.

212644362243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70881454084.

The product of its digits is 331776, while the sum is 39.

The spelling of 212644362243 in words is "two hundred twelve billion, six hundred forty-four million, three hundred sixty-two thousand, two hundred forty-three".