2181086 has 8 divisors (see below), whose sum is σ = 3443880. Its totient is φ = 1033128.

The previous prime is 2181079. The next prime is 2181097. The reversal of 2181086 is 6801812.

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

It is a super-2 number, since 2×2181086² = 9514272278792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28661 + ... + 28736.

It is an arithmetic number, because the mean of its divisors is an integer number (430485).

2^2181086 is an apocalyptic number.

2181086 is a deficient number, since it is larger than the sum of its proper divisors (1262794).

2181086 is a wasteful number, since it uses less digits than its factorization.

2181086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57418.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2181086 is about 1476.8500262383. The cubic root of 2181086 is about 129.6853534555.

Adding to 2181086 its reverse (6801812), we get a palindrome (8982898).

The spelling of 2181086 in words is "two million, one hundred eighty-one thousand, eighty-six".