2181652 has 24 divisors (see below), whose sum is σ = 4203360. Its totient is φ = 982560.

The previous prime is 2181649. The next prime is 2181659. The reversal of 2181652 is 2561812.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7738 + ... + 8014.

It is an arithmetic number, because the mean of its divisors is an integer number (175140).

2^2181652 is an apocalyptic number.

2181652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2181652 is a deficient number, since it is larger than the sum of its proper divisors (2021708).

2181652 is a wasteful number, since it uses less digits than its factorization.

2181652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 469 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 2181652 is about 1477.0416378694. The cubic root of 2181652 is about 129.6965704306.

The spelling of 2181652 in words is "two million, one hundred eighty-one thousand, six hundred fifty-two".