2118481 has 8 divisors (see below), whose sum is σ = 2282720. Its totient is φ = 1959552.

The previous prime is 2118449. The next prime is 2118491. The reversal of 2118481 is 1848112.

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

It is a 7-Lehmer number, since φ(2118481) divides (2118481-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 2118481 - 2⁵ = 2118449 is a prime.

It is a super-2 number, since 2×2118481² = 8975923494722, which contains 22 as substring.

It is the 1456-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118491) by changing a digit.

It is a nontrivial repunit in base 1455.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (285340).

2^2118481 is an apocalyptic number.

It is an amenable number.

2118481 is a deficient number, since it is larger than the sum of its proper divisors (164239).

2118481 is a wasteful number, since it uses less digits than its factorization.

2118481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655.

The product of its digits is 512, while the sum is 25.

The square root of 2118481 is about 1455.5002576434. The cubic root of 2118481 is about 128.4324767504.

The spelling of 2118481 in words is "two million, one hundred eighteen thousand, four hundred eighty-one".