4220429981 has 2 divisors, whose sum is σ = 4220429982. Its totient is φ = 4220429980.

The previous prime is 4220429971. The next prime is 4220429987. The reversal of 4220429981 is 1899240224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4208116900 + 12313081 = 64870^2 + 3509^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220429981 - 2³⁰ = 3146688157 is a prime.

It is a super-2 number, since 2×4220429981² = 35624058449047320722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4220429987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110214990 + 2110214991.

It is an arithmetic number, because the mean of its divisors is an integer number (2110214991).

Almost surely, 2^4220429981 is an apocalyptic number.

It is an amenable number.

4220429981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4220429981 is an equidigital number, since it uses as much as digits as its factorization.

4220429981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 4220429981 is about 64964.8364963693. The cubic root of 4220429981 is about 1616.0404725766.

The spelling of 4220429981 in words is "four billion, two hundred twenty million, four hundred twenty-nine thousand, nine hundred eighty-one".