2181180 has 24 divisors (see below), whose sum is σ = 6107472. Its totient is φ = 581632.

The previous prime is 2181173. The next prime is 2181203. The reversal of 2181180 is 811812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18117 + ... + 18236.

It is an arithmetic number, because the mean of its divisors is an integer number (254478).

2^2181180 is an apocalyptic number.

2181180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2181180 is an abundant number, since it is smaller than the sum of its proper divisors (3926292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2181180 is a wasteful number, since it uses less digits than its factorization.

2181180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36365 (or 36363 counting only the distinct ones).

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

The square root of 2181180 is about 1476.8818503861. The cubic root of 2181180 is about 129.6872164798.

Adding to 2181180 its reverse (811812), we get a palindrome (2992992).

The spelling of 2181180 in words is "two million, one hundred eighty-one thousand, one hundred eighty".