212532650405 has 4 divisors (see below), whose sum is σ = 255039180492. Its totient is φ = 170026120320.

The previous prime is 212532650401. The next prime is 212532650413. The reversal of 212532650405 is 504056235212.

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 23438997604 + 189093652801 = 153098^2 + 434849^2 .

It is not a de Polignac number, because 212532650405 - 2² = 212532650401 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 (212532650401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21253265036 + ... + 21253265045.

It is an arithmetic number, because the mean of its divisors is an integer number (63759795123).

Almost surely, 2^212532650405 is an apocalyptic number.

It is an amenable number.

212532650405 is a deficient number, since it is larger than the sum of its proper divisors (42506530087).

212532650405 is an equidigital number, since it uses as much as digits as its factorization.

212532650405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42506530086.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 212532650405 its reverse (504056235212), we get a palindrome (716588885617).

The spelling of 212532650405 in words is "two hundred twelve billion, five hundred thirty-two million, six hundred fifty thousand, four hundred five".