163316331 has 20 divisors (see below), whose sum is σ = 258319512. Its totient is φ = 102472128.

The previous prime is 163316327. The next prime is 163316359. The reversal of 163316331 is 133613361.

163316331 is a `hidden beast` number, since 16 + 3 + 316 + 331 = 666.

It is not a de Polignac number, because 163316331 - 2² = 163316327 is a prime.

It is a super-2 number, since 2×163316331² = 53344447942603122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 163316295 and 163316304.

It is not an unprimeable number, because it can be changed into a prime (163316311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 57925 + ... + 60678.

Almost surely, 2^163316331 is an apocalyptic number.

163316331 is a deficient number, since it is larger than the sum of its proper divisors (95003181).

163316331 is a wasteful number, since it uses less digits than its factorization.

163316331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118632 (or 118623 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

The square root of 163316331 is about 12779.5278081782. The cubic root of 163316331 is about 546.6086980389.

Adding to 163316331 its reverse (133613361), we get a palindrome (296929692).

The spelling of 163316331 in words is "one hundred sixty-three million, three hundred sixteen thousand, three hundred thirty-one".