9381663231 has 16 divisors (see below), whose sum is σ = 13941792000. Its totient is φ = 5576715648.

The previous prime is 9381663211. The next prime is 9381663233. The reversal of 9381663231 is 1323661839.

It is not a de Polignac number, because 9381663231 - 2⁷ = 9381663103 is a prime.

It is a super-2 number, since 2×9381663231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9381663233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4839931 + ... + 4841868.

It is an arithmetic number, because the mean of its divisors is an integer number (871362000).

Almost surely, 2^9381663231 is an apocalyptic number.

9381663231 is a deficient number, since it is larger than the sum of its proper divisors (4560128769).

9381663231 is a wasteful number, since it uses less digits than its factorization.

9381663231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9681838.

The product of its digits is 139968, while the sum is 42.

The square root of 9381663231 is about 96858.9863203203. The cubic root of 9381663231 is about 2109.0810993209.

The spelling of 9381663231 in words is "nine billion, three hundred eighty-one million, six hundred sixty-three thousand, two hundred thirty-one".