52021212444 has 24 divisors (see below), whose sum is σ = 134869810320. Its totient is φ = 17340404112.

The previous prime is 52021212427. The next prime is 52021212487. The reversal of 52021212444 is 44421212025.

It is a happy number.

52021212444 is a `hidden beast` number, since 5 + 2 + 0 + 2 + 1 + 212 + 444 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240838839 + ... + 240839054.

It is an arithmetic number, because the mean of its divisors is an integer number (5619575430).

Almost surely, 2^52021212444 is an apocalyptic number.

52021212444 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

52021212444 is an abundant number, since it is smaller than the sum of its proper divisors (82848597876).

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

52021212444 is a wasteful number, since it uses less digits than its factorization.

52021212444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481677906 (or 481677898 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 52021212444 its reverse (44421212025), we get a palindrome (96442424469).

The spelling of 52021212444 in words is "fifty-two billion, twenty-one million, two hundred twelve thousand, four hundred forty-four".