2155544 has 16 divisors (see below), whose sum is σ = 4098120. Its totient is φ = 1062720.

The previous prime is 2155519. The next prime is 2155579. The reversal of 2155544 is 4455512.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 1262 + ... + 2429.

2^2155544 is an apocalyptic number.

It is an amenable number.

2155544 is a deficient number, since it is larger than the sum of its proper divisors (1942576).

2155544 is a wasteful number, since it uses less digits than its factorization.

2155544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770 (or 3766 counting only the distinct ones).

The product of its digits is 4000, while the sum is 26.

The square root of 2155544 is about 1468.1771010338. The cubic root of 2155544 is about 129.1771298265.

Subtracting 2155544 from its reverse (4455512), we obtain a cube (2299968 = 132³).

The spelling of 2155544 in words is "two million, one hundred fifty-five thousand, five hundred forty-four".