2181532 has 24 divisors (see below), whose sum is σ = 4011392. Its totient is φ = 1036800.

The previous prime is 2181503. The next prime is 2181539. The reversal of 2181532 is 2351812.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181539) 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, 8932 + ... + 9172.

2^2181532 is an apocalyptic number.

It is an amenable number.

2181532 is a deficient number, since it is larger than the sum of its proper divisors (1829860).

2181532 is a wasteful number, since it uses less digits than its factorization.

2181532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 347 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 2181532 is about 1477.0010155718. The cubic root of 2181532 is about 129.6941924354.

The spelling of 2181532 in words is "two million, one hundred eighty-one thousand, five hundred thirty-two".