2155055 has 16 divisors (see below), whose sum is σ = 3002880. Its totient is φ = 1454112.

The previous prime is 2155009. The next prime is 2155057. The reversal of 2155055 is 5505512.

It is a cyclic number.

It is not a de Polignac number, because 2155055 - 2¹⁴ = 2138671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2155055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1886 + ... + 2804.

It is an arithmetic number, because the mean of its divisors is an integer number (187680).

2^2155055 is an apocalyptic number.

2155055 is a deficient number, since it is larger than the sum of its proper divisors (847825).

2155055 is an equidigital number, since it uses as much as digits as its factorization.

2155055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 2155055 is about 1468.0105585451. The cubic root of 2155055 is about 129.1673608472.

The spelling of 2155055 in words is "two million, one hundred fifty-five thousand, fifty-five".