2230021 has 2 divisors, whose sum is σ = 2230022. Its totient is φ = 2230020.

The previous prime is 2230001. The next prime is 2230051. The reversal of 2230021 is 1200322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1179396 + 1050625 = 1086^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 2230021 - 2⁷ = 2229893 is a prime.

2230021 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2230001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115010 + 1115011.

It is an arithmetic number, because the mean of its divisors is an integer number (1115011).

2^2230021 is an apocalyptic number.

It is an amenable number.

2230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2230021 is an equidigital number, since it uses as much as digits as its factorization.

2230021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2230021 is about 1493.3254836103. The cubic root of 2230021 is about 130.6480657207.

Adding to 2230021 its reverse (1200322), we get a palindrome (3430343).

The spelling of 2230021 in words is "two million, two hundred thirty thousand, twenty-one".