52213213440 has 144 divisors (see below), whose sum is σ = 185284512000. Its totient is φ = 13923514368.

The previous prime is 52213213387. The next prime is 52213213441. The reversal of 52213213440 is 4431231225.

52213213440 is a `hidden beast` number, since 5 + 2 + 2 + 1 + 3 + 213 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (52213213441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720840 + ... + 789959.

It is an arithmetic number, because the mean of its divisors is an integer number (1286698000).

Almost surely, 2^52213213440 is an apocalyptic number.

It is an amenable number.

52213213440 is an abundant number, since it is smaller than the sum of its proper divisors (133071298560).

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

52213213440 is a wasteful number, since it uses less digits than its factorization.

52213213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510829 (or 1510809 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 52213213440 its reverse (4431231225), we get a palindrome (56644444665).

The spelling of 52213213440 in words is "fifty-two billion, two hundred thirteen million, two hundred thirteen thousand, four hundred forty".