2155584 has 56 divisors (see below), whose sum is σ = 5811520. Its totient is φ = 705024.

The previous prime is 2155579. The next prime is 2155597. The reversal of 2155584 is 4855512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19722 + ... + 19830.

2^2155584 is an apocalyptic number.

2155584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2905760).

2155584 is an abundant number, since it is smaller than the sum of its proper divisors (3655936).

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

2155584 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (2155583) it forms an eRAP, since the sums of their prime factors are consecutive (226 and 227).

2155584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 217 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The square root of 2155584 is about 1468.1907233054. The cubic root of 2155584 is about 129.1779288596.

The spelling of 2155584 in words is "two million, one hundred fifty-five thousand, five hundred eighty-four".