9220559681 has 2 divisors, whose sum is σ = 9220559682. Its totient is φ = 9220559680.

The previous prime is 9220559651. The next prime is 9220559683. The reversal of 9220559681 is 1869550229.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8079133456 + 1141426225 = 89884^2 + 33785^2 .

It is an emirp because it is prime and its reverse (1869550229) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9220559681 - 2¹⁰ = 9220558657 is a prime.

It is a super-2 number, since 2×9220559681² (a number of 21 digits) contains 22 as substring.

Together with 9220559683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9220559683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4610279840 + 4610279841.

It is an arithmetic number, because the mean of its divisors is an integer number (4610279841).

Almost surely, 2^9220559681 is an apocalyptic number.

It is an amenable number.

9220559681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9220559681 is an equidigital number, since it uses as much as digits as its factorization.

9220559681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 9220559681 is about 96023.7454018536. The cubic root of 9220559681 is about 2096.9388264361.

The spelling of 9220559681 in words is "nine billion, two hundred twenty million, five hundred fifty-nine thousand, six hundred eighty-one".