2155117 has 4 divisors (see below), whose sum is σ = 2205280. Its totient is φ = 2104956.

The previous prime is 2155103. The next prime is 2155121. The reversal of 2155117 is 7115512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2155117 - 2¹¹ = 2153069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25017 + ... + 25102.

It is an arithmetic number, because the mean of its divisors is an integer number (551320).

2^2155117 is an apocalyptic number.

It is an amenable number.

2155117 is a deficient number, since it is larger than the sum of its proper divisors (50163).

2155117 is an equidigital number, since it uses as much as digits as its factorization.

2155117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50162.

The product of its digits is 350, while the sum is 22.

The square root of 2155117 is about 1468.0316754076. The cubic root of 2155117 is about 129.1685995317.

The spelling of 2155117 in words is "two million, one hundred fifty-five thousand, one hundred seventeen".