2081655 has 24 divisors (see below), whose sum is σ = 3642912. Its totient is φ = 1099584.

The previous prime is 2081647. The next prime is 2081671. The reversal of 2081655 is 5561802.

2081655 is a `hidden beast` number, since 2 + 0 + 8 + 1 + 655 = 666.

It is not a de Polignac number, because 2081655 - 2³ = 2081647 is a prime.

2081655 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7377 + ... + 7653.

It is an arithmetic number, because the mean of its divisors is an integer number (151788).

2^2081655 is an apocalyptic number.

2081655 is a deficient number, since it is larger than the sum of its proper divisors (1561257).

2081655 is a wasteful number, since it uses less digits than its factorization.

2081655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2081655 is about 1442.7941641135. The cubic root of 2081655 is about 127.6839329140.

The spelling of 2081655 in words is "two million, eighty-one thousand, six hundred fifty-five".