2181210 has 16 divisors (see below), whose sum is σ = 5234976. Its totient is φ = 581648.

The previous prime is 2181209. The next prime is 2181217. The reversal of 2181210 is 121812.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2181210.

It is not an unprimeable number, because it can be changed into a prime (2181217) 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, 36324 + ... + 36383.

It is an arithmetic number, because the mean of its divisors is an integer number (327186).

2^2181210 is an apocalyptic number.

2181210 is an abundant number, since it is smaller than the sum of its proper divisors (3053766).

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

2181210 is a wasteful number, since it uses less digits than its factorization.

2181210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72717.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2181210 is about 1476.8920068847. The cubic root of 2181210 is about 129.6878110507.

The spelling of 2181210 in words is "two million, one hundred eighty-one thousand, two hundred ten".