2108181 has 8 divisors (see below), whose sum is σ = 2864160. Its totient is φ = 1378832.

The previous prime is 2108177. The next prime is 2108231. The reversal of 2108181 is 1818012.

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

It is a cyclic number.

It is not a de Polignac number, because 2108181 - 2² = 2108177 is a prime.

It is a super-2 number, since 2×2108181² = 8888854257522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6471 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (358020).

2^2108181 is an apocalyptic number.

It is an amenable number.

2108181 is a deficient number, since it is larger than the sum of its proper divisors (755979).

2108181 is a wasteful number, since it uses less digits than its factorization.

2108181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13315.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 2108181 is about 1451.9576440103. The cubic root of 2108181 is about 128.2239933740.

The spelling of 2108181 in words is "two million, one hundred eight thousand, one hundred eighty-one".