2118291 has 16 divisors (see below), whose sum is σ = 3398400. Its totient is φ = 1146528.

The previous prime is 2118283. The next prime is 2118299. The reversal of 2118291 is 1928112.

It is an interprime number because it is at equal distance from previous prime (2118283) and next prime (2118299).

It is not a de Polignac number, because 2118291 - 2³ = 2118283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2118299) 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, 2256 + ... + 3053.

It is an arithmetic number, because the mean of its divisors is an integer number (212400).

2^2118291 is an apocalyptic number.

2118291 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2118291 is a deficient number, since it is larger than the sum of its proper divisors (1280109).

2118291 is a wasteful number, since it uses less digits than its factorization.

2118291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338.

The product of its digits is 288, while the sum is 24.

The square root of 2118291 is about 1455.4349865246. The cubic root of 2118291 is about 128.4286370652.

The spelling of 2118291 in words is "two million, one hundred eighteen thousand, two hundred ninety-one".