212338520437 has 4 divisors (see below), whose sum is σ = 212390966700. Its totient is φ = 212286074176.

The previous prime is 212338520413. The next prime is 212338520453. The reversal of 212338520437 is 734025833212.

212338520437 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 78564726436 + 133773794001 = 280294^2 + 365751^2 .

It is a cyclic number.

It is not a de Polignac number, because 212338520437 - 2²³ = 212330131829 is a prime.

It is a super-2 number, since 2×212338520437² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212338520437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212338820437) 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, 26217058 + ... + 26225155.

It is an arithmetic number, because the mean of its divisors is an integer number (53097741675).

Almost surely, 2^212338520437 is an apocalyptic number.

It is an amenable number.

212338520437 is a deficient number, since it is larger than the sum of its proper divisors (52446263).

212338520437 is an equidigital number, since it uses as much as digits as its factorization.

212338520437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52446262.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 212338520437 in words is "two hundred twelve billion, three hundred thirty-eight million, five hundred twenty thousand, four hundred thirty-seven".