212443423043400 has 144 divisors (see below), whose sum is σ = 714393357745860. Its totient is φ = 56577135513600.

The previous prime is 212443423043387. The next prime is 212443423043407. The reversal of 212443423043400 is 4340324344212.

212443423043400 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 4 + 3 + 4 + 2 + 304 + 340 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 20024855307396 + 192418567736004 = 4474914^2 + 13871502^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (212443423043407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 76175617 + ... + 78915216.

Almost surely, 2^{212443423043400} is an apocalyptic number.

212443423043400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212443423043400 is an abundant number, since it is smaller than the sum of its proper divisors (501949934702460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212443423043400 is a wasteful number, since it uses less digits than its factorization.

212443423043400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155091616 (or 155091604 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 212443423043400 its reverse (4340324344212), we get a palindrome (216783747387612).

The spelling of 212443423043400 in words is "two hundred twelve trillion, four hundred forty-three billion, four hundred twenty-three million, forty-three thousand, four hundred".