2021022439 has 2 divisors, whose sum is σ = 2021022440. Its totient is φ = 2021022438.

The previous prime is 2021022359. The next prime is 2021022461. The reversal of 2021022439 is 9342201202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021022439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021026439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010511219 + 1010511220.

It is an arithmetic number, because the mean of its divisors is an integer number (1010511220).

Almost surely, 2^2021022439 is an apocalyptic number.

2021022439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021022439 is an equidigital number, since it uses as much as digits as its factorization.

2021022439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2021022439 is about 44955.7831541171. The cubic root of 2021022439 is about 1264.3201081232.

The spelling of 2021022439 in words is "two billion, twenty-one million, twenty-two thousand, four hundred thirty-nine".