2210009981 has 2 divisors, whose sum is σ = 2210009982. Its totient is φ = 2210009980.

The previous prime is 2210009959. The next prime is 2210010007. The reversal of 2210009981 is 1899000122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1988268100 + 221741881 = 44590^2 + 14891^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210009981 - 2³⁰ = 1136268157 is a prime.

It is a super-2 number, since 2×2210009981² = 9768288232239240722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2210009951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105004990 + 1105004991.

It is an arithmetic number, because the mean of its divisors is an integer number (1105004991).

Almost surely, 2^2210009981 is an apocalyptic number.

It is an amenable number.

2210009981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210009981 is an equidigital number, since it uses as much as digits as its factorization.

2210009981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 2210009981 is about 47010.7432508783. The cubic root of 2210009981 is about 1302.5610226309.

The spelling of 2210009981 in words is "two billion, two hundred ten million, nine thousand, nine hundred eighty-one".