2161330 has 8 divisors (see below), whose sum is σ = 3890412. Its totient is φ = 864528.

The previous prime is 2161319. The next prime is 2161331. The reversal of 2161330 is 331612.

2161330 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 2 ways, for example, as 2047761 + 113569 = 1431^2 + 337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 108057 + ... + 108076.

2^2161330 is an apocalyptic number.

2161330 is a deficient number, since it is larger than the sum of its proper divisors (1729082).

2161330 is a wasteful number, since it uses less digits than its factorization.

2161330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216140.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2161330 is about 1470.1462512281. The cubic root of 2161330 is about 129.2926074225.

Adding to 2161330 its reverse (331612), we get a palindrome (2492942).

The spelling of 2161330 in words is "two million, one hundred sixty-one thousand, three hundred thirty".