2330821 has 4 divisors (see below), whose sum is σ = 2357100. Its totient is φ = 2304544.

The previous prime is 2330789. The next prime is 2330827. The reversal of 2330821 is 1280332.

It is a happy number.

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 1185921 + 1144900 = 1089^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2330821 - 2⁵ = 2330789 is a prime.

It is a Duffinian number.

2330821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2330827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13006 + ... + 13183.

It is an arithmetic number, because the mean of its divisors is an integer number (589275).

2^2330821 is an apocalyptic number.

It is an amenable number.

2330821 is a deficient number, since it is larger than the sum of its proper divisors (26279).

2330821 is an equidigital number, since it uses as much as digits as its factorization.

2330821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26278.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2330821 is about 1526.7026560532. The cubic root of 2330821 is about 132.5876197486.

The spelling of 2330821 in words is "two million, three hundred thirty thousand, eight hundred twenty-one".