212331306889 has 4 divisors (see below), whose sum is σ = 228664484356. Its totient is φ = 195998129424.

The previous prime is 212331306881. The next prime is 212331306937. The reversal of 212331306889 is 988603133212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138241188864 + 74090118025 = 371808^2 + 272195^2 .

It is a cyclic number.

It is not a de Polignac number, because 212331306889 - 2³ = 212331306881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212331306881) 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, 8166588714 + ... + 8166588739.

It is an arithmetic number, because the mean of its divisors is an integer number (57166121089).

Almost surely, 2^212331306889 is an apocalyptic number.

It is an amenable number.

212331306889 is a deficient number, since it is larger than the sum of its proper divisors (16333177467).

212331306889 is a wasteful number, since it uses less digits than its factorization.

212331306889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16333177466.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 212331306889 in words is "two hundred twelve billion, three hundred thirty-one million, three hundred six thousand, eight hundred eighty-nine".