2181099 has 8 divisors (see below), whose sum is σ = 2914960. Its totient is φ = 1450656.

The previous prime is 2181097. The next prime is 2181131. The reversal of 2181099 is 9901812.

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

It is not a de Polignac number, because 2181099 - 2¹ = 2181097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181097) 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, 2049 + ... + 2925.

It is an arithmetic number, because the mean of its divisors is an integer number (364370).

2^2181099 is an apocalyptic number.

2181099 is a deficient number, since it is larger than the sum of its proper divisors (733861).

2181099 is an equidigital number, since it uses as much as digits as its factorization.

2181099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 2181099 is about 1476.8544274911. The cubic root of 2181099 is about 129.6856111110.

The spelling of 2181099 in words is "two million, one hundred eighty-one thousand, ninety-nine".