8229116981 has 4 divisors (see below), whose sum is σ = 8368593600. Its totient is φ = 8089640364.

The previous prime is 8229116969. The next prime is 8229116983. The reversal of 8229116981 is 1896119228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8229116981 - 2¹⁰ = 8229115957 is a prime.

It is a super-2 number, since 2×8229116981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8229116983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69738221 + ... + 69738338.

It is an arithmetic number, because the mean of its divisors is an integer number (2092148400).

Almost surely, 2^8229116981 is an apocalyptic number.

It is an amenable number.

8229116981 is a deficient number, since it is larger than the sum of its proper divisors (139476619).

8229116981 is a wasteful number, since it uses less digits than its factorization.

8229116981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139476618.

The product of its digits is 124416, while the sum is 47.

The square root of 8229116981 is about 90714.4805474848. The cubic root of 8229116981 is about 2018.9136547559.

The spelling of 8229116981 in words is "eight billion, two hundred twenty-nine million, one hundred sixteen thousand, nine hundred eighty-one".