55091584 has 32 divisors (see below), whose sum is σ = 110649600. Its totient is φ = 27320832.

The previous prime is 55091581. The next prime is 55091591. The reversal of 55091584 is 48519055.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55091581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14562 + ... + 17950.

It is an arithmetic number, because the mean of its divisors is an integer number (3457800).

Almost surely, 2^55091584 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 55091584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55324800).

55091584 is an abundant number, since it is smaller than the sum of its proper divisors (55558016).

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

55091584 is a wasteful number, since it uses less digits than its factorization.

55091584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 55091584 is about 7422.3705108274. The cubic root of 55091584 is about 380.5062136259.

The spelling of 55091584 in words is "fifty-five million, ninety-one thousand, five hundred eighty-four".