4221155789 has 2 divisors, whose sum is σ = 4221155790. Its totient is φ = 4221155788.

The previous prime is 4221155761. The next prime is 4221155791. The reversal of 4221155789 is 9875511224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2834710564 + 1386445225 = 53242^2 + 37235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221155789 is a prime.

Together with 4221155791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221154789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110577894 + 2110577895.

It is an arithmetic number, because the mean of its divisors is an integer number (2110577895).

Almost surely, 2^4221155789 is an apocalyptic number.

It is an amenable number.

4221155789 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221155789 is an equidigital number, since it uses as much as digits as its factorization.

4221155789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 44.

The square root of 4221155789 is about 64970.4224166659. The cubic root of 4221155789 is about 1616.1331067297.

The spelling of 4221155789 in words is "four billion, two hundred twenty-one million, one hundred fifty-five thousand, seven hundred eighty-nine".