212224403440 has 40 divisors (see below), whose sum is σ = 563910559200. Its totient is φ = 72762652416.

The previous prime is 212224403423. The next prime is 212224403459. The reversal of 212224403440 is 44304422212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 212224403399 and 212224403408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189485515 + ... + 189486634.

It is an arithmetic number, because the mean of its divisors is an integer number (14097763980).

Almost surely, 2^212224403440 is an apocalyptic number.

212224403440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212224403440 is an abundant number, since it is smaller than the sum of its proper divisors (351686155760).

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

212224403440 is a wasteful number, since it uses less digits than its factorization.

212224403440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378972169 (or 378972163 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 212224403440 its reverse (44304422212), we get a palindrome (256528825652).

The spelling of 212224403440 in words is "two hundred twelve billion, two hundred twenty-four million, four hundred three thousand, four hundred forty".