9932216981 has 2 divisors, whose sum is σ = 9932216982. Its totient is φ = 9932216980.

The previous prime is 9932216971. The next prime is 9932216993. The reversal of 9932216981 is 1896122399.

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., 7810140625 + 2122076356 = 88375^2 + 46066^2 .

It is a cyclic number.

It is not a de Polignac number, because 9932216981 - 2²² = 9928022677 is a prime.

It is a super-2 number, since 2×9932216981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9932216911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4966108490 + 4966108491.

It is an arithmetic number, because the mean of its divisors is an integer number (4966108491).

Almost surely, 2^9932216981 is an apocalyptic number.

It is an amenable number.

9932216981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9932216981 is an equidigital number, since it uses as much as digits as its factorization.

9932216981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 50.

The square root of 9932216981 is about 99660.5086330589. The cubic root of 9932216981 is about 2149.5558470297. Note that the first 3 decimals are identical.

The spelling of 9932216981 in words is "nine billion, nine hundred thirty-two million, two hundred sixteen thousand, nine hundred eighty-one".