2155144 has 8 divisors (see below), whose sum is σ = 4040910. Its totient is φ = 1077568.

The previous prime is 2155133. The next prime is 2155159. The reversal of 2155144 is 4415512.

2155144 is digitally balanced in base 5, 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 only one way, i.e., 1592644 + 562500 = 1262^2 + 750^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134689 + ... + 134704.

2^2155144 is an apocalyptic number.

It is an amenable number.

2155144 is a deficient number, since it is larger than the sum of its proper divisors (1885766).

2155144 is a wasteful number, since it uses less digits than its factorization.

2155144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269399 (or 269395 counting only the distinct ones).

The product of its digits is 800, while the sum is 22.

The square root of 2155144 is about 1468.0408713656. The cubic root of 2155144 is about 129.1691389514.

The spelling of 2155144 in words is "two million, one hundred fifty-five thousand, one hundred forty-four".