2150321 has 4 divisors (see below), whose sum is σ = 2224500. Its totient is φ = 2076144.

The previous prime is 2150303. The next prime is 2150333. The reversal of 2150321 is 1230512.

It is a happy number.

2150321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1221025 + 929296 = 1105^2 + 964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2150321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2150296 and 2150305.

It is not an unprimeable number, because it can be changed into a prime (2150341) 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, 37046 + ... + 37103.

It is an arithmetic number, because the mean of its divisors is an integer number (556125).

2^2150321 is an apocalyptic number.

It is an amenable number.

2150321 is a deficient number, since it is larger than the sum of its proper divisors (74179).

2150321 is an equidigital number, since it uses as much as digits as its factorization.

2150321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74178.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2150321 is about 1466.3972858676. The cubic root of 2150321 is about 129.0727110467.

Adding to 2150321 its reverse (1230512), we get a palindrome (3380833).

The spelling of 2150321 in words is "two million, one hundred fifty thousand, three hundred twenty-one".