55021320552 has 64 divisors (see below), whose sum is σ = 150812352000. Its totient is φ = 16589327040.

The previous prime is 55021320509. The next prime is 55021320569. The reversal of 55021320552 is 25502312055.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471118 + ... + 576189.

It is an arithmetic number, because the mean of its divisors is an integer number (2356443000).

Almost surely, 2^55021320552 is an apocalyptic number.

It is an amenable number.

55021320552 is an abundant number, since it is smaller than the sum of its proper divisors (95791031448).

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

55021320552 is a wasteful number, since it uses less digits than its factorization.

55021320552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047526 (or 1047522 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

It can be divided in two parts, 55021 and 320552, that added together give a palindrome (375573).

The spelling of 55021320552 in words is "fifty-five billion, twenty-one million, three hundred twenty thousand, five hundred fifty-two".