2155755 has 32 divisors (see below), whose sum is σ = 4032000. Its totient is φ = 983136.

The previous prime is 2155733. The next prime is 2155781. The reversal of 2155755 is 5575512.

2155755 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 2155755 - 2⁵ = 2155723 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4936 + ... + 5354.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

2^2155755 is an apocalyptic number.

2155755 is a deficient number, since it is larger than the sum of its proper divisors (1876245).

2155755 is an equidigital number, since it uses as much as digits as its factorization.

2155755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 434 counting only the distinct ones).

The product of its digits is 8750, while the sum is 30.

The square root of 2155755 is about 1468.2489570914. The cubic root of 2155755 is about 129.1813446148.

It can be divided in two parts, 21557 and 55, that added together give a palindrome (21612).

The spelling of 2155755 in words is "two million, one hundred fifty-five thousand, seven hundred fifty-five".