55521636 has 24 divisors (see below), whose sum is σ = 130888800. Its totient is φ = 18316032.

The previous prime is 55521611. The next prime is 55521649. The reversal of 55521636 is 63612555.

55521636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55521597 and 55521606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22686 + ... + 25013.

It is an arithmetic number, because the mean of its divisors is an integer number (5453700).

Almost surely, 2^55521636 is an apocalyptic number.

It is an amenable number.

55521636 is an abundant number, since it is smaller than the sum of its proper divisors (75367164).

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

55521636 is a wasteful number, since it uses less digits than its factorization.

55521636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47803 (or 47801 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 55521636 is about 7451.2841846221. The cubic root of 55521636 is about 381.4937419780.

The spelling of 55521636 in words is "fifty-five million, five hundred twenty-one thousand, six hundred thirty-six".