4220320549 has 2 divisors, whose sum is σ = 4220320550. Its totient is φ = 4220320548.

The previous prime is 4220320543. The next prime is 4220320579. The reversal of 4220320549 is 9450230224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2923024225 + 1297296324 = 54065^2 + 36018^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220320549 - 2⁷ = 4220320421 is a prime.

It is a super-2 number, since 2×4220320549² = 35622211072623322802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4220320549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4220320543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110160274 + 2110160275.

It is an arithmetic number, because the mean of its divisors is an integer number (2110160275).

Almost surely, 2^4220320549 is an apocalyptic number.

It is an amenable number.

4220320549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4220320549 is an equidigital number, since it uses as much as digits as its factorization.

4220320549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 4220320549 is about 64963.9942506617. The cubic root of 4220320549 is about 1616.0265049579.

The spelling of 4220320549 in words is "four billion, two hundred twenty million, three hundred twenty thousand, five hundred forty-nine".