2161332 has 18 divisors (see below), whose sum is σ = 5463458. Its totient is φ = 720432.

The previous prime is 2161331. The next prime is 2161337. The reversal of 2161332 is 2331612.

2161332 is a `hidden beast` number, since 21 + 613 + 32 = 666.

2161332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 104976 = 1434^2 + 324^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29983 + ... + 30054.

2^2161332 is an apocalyptic number.

It is an amenable number.

2161332 is an abundant number, since it is smaller than the sum of its proper divisors (3302126).

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

2161332 is a wasteful number, since it uses less digits than its factorization.

2161332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60047 (or 60042 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2161332 is about 1470.1469314324. The cubic root of 2161332 is about 129.2926473031.

Adding to 2161332 its reverse (2331612), we get a palindrome (4492944).

The spelling of 2161332 in words is "two million, one hundred sixty-one thousand, three hundred thirty-two".