212683388437 has 4 divisors (see below), whose sum is σ = 229043649100. Its totient is φ = 196323127776.

The previous prime is 212683388399. The next prime is 212683388447. The reversal of 212683388437 is 734883386212.

It is a happy number.

212683388437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53570954116 + 159112434321 = 231454^2 + 398889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212683388437 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 (212683388447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8180130312 + ... + 8180130337.

It is an arithmetic number, because the mean of its divisors is an integer number (57260912275).

Almost surely, 2^212683388437 is an apocalyptic number.

It is an amenable number.

212683388437 is a deficient number, since it is larger than the sum of its proper divisors (16360260663).

212683388437 is a wasteful number, since it uses less digits than its factorization.

212683388437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16360260662.

The product of its digits is 9289728, while the sum is 55.

The spelling of 212683388437 in words is "two hundred twelve billion, six hundred eighty-three million, three hundred eighty-eight thousand, four hundred thirty-seven".