55521508 has 36 divisors (see below), whose sum is σ = 113611260. Its totient is φ = 23671872.

The previous prime is 55521491. The next prime is 55521511. The reversal of 55521508 is 80512555.

55521508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47444544 + 8076964 = 6888^2 + 2842^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55521508.

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 11 ways as a sum of consecutive naturals, for example, 44266 + ... + 45502.

Almost surely, 2^55521508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55521508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56805630).

55521508 is an abundant number, since it is smaller than the sum of its proper divisors (58089752).

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

55521508 is a wasteful number, since it uses less digits than its factorization.

55521508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 1475 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 31.

The square root of 55521508 is about 7451.2755954937. The cubic root of 55521508 is about 381.4934488116.

The spelling of 55521508 in words is "fifty-five million, five hundred twenty-one thousand, five hundred eight".