2156655 has 16 divisors (see below), whose sum is σ = 3508704. Its totient is φ = 1130880.

The previous prime is 2156647. The next prime is 2156659. The reversal of 2156655 is 5566512.

2156655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2156655 - 2³ = 2156647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (219294).

2^2156655 is an apocalyptic number.

2156655 is a deficient number, since it is larger than the sum of its proper divisors (1352049).

2156655 is a wasteful number, since it uses less digits than its factorization.

2156655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426.

The product of its digits is 9000, while the sum is 30.

The square root of 2156655 is about 1468.5554126420. Note that the first 3 decimals coincide. The cubic root of 2156655 is about 129.1993192972.

The spelling of 2156655 in words is "two million, one hundred fifty-six thousand, six hundred fifty-five".