2155504 has 40 divisors (see below), whose sum is σ = 4621232. Its totient is φ = 967680.

The previous prime is 2155499. The next prime is 2155511. The reversal of 2155504 is 4055512.

It is a congruent number.

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, 8824 + ... + 9064.

2^2155504 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 2155504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2310616).

2155504 is an abundant number, since it is smaller than the sum of its proper divisors (2465728).

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

2155504 is a wasteful number, since it uses less digits than its factorization.

2155504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 2155504 is about 1468.1634786358. The cubic root of 2155504 is about 129.1763307835.

The spelling of 2155504 in words is "two million, one hundred fifty-five thousand, five hundred four".