2155505 has 8 divisors (see below), whose sum is σ = 2821824. Its totient is φ = 1567600.

The previous prime is 2155499. The next prime is 2155511. The reversal of 2155505 is 5055512.

2155505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2155499) and next prime (2155511).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2155505 - 2¹⁸ = 1893361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 19541 + ... + 19650.

It is an arithmetic number, because the mean of its divisors is an integer number (352728).

2^2155505 is an apocalyptic number.

It is an amenable number.

2155505 is a deficient number, since it is larger than the sum of its proper divisors (666319).

2155505 is a wasteful number, since it uses less digits than its factorization.

2155505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39207.

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

The square root of 2155505 is about 1468.1638191973. The cubic root of 2155505 is about 129.1763507597.

The spelling of 2155505 in words is "two million, one hundred fifty-five thousand, five hundred five".