117323181 has 16 divisors (see below), whose sum is σ = 178053120. Its totient is φ = 76307040.

The previous prime is 117323177. The next prime is 117323197. The reversal of 117323181 is 181323711.

It is a happy number.

It is not a de Polignac number, because 117323181 - 2² = 117323177 is a prime.

It is a super-2 number, since 2×117323181² = 27529457599917522, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117323881) 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, 51885 + ... + 54098.

It is an arithmetic number, because the mean of its divisors is an integer number (11128320).

Almost surely, 2^117323181 is an apocalyptic number.

It is an amenable number.

117323181 is a deficient number, since it is larger than the sum of its proper divisors (60729939).

117323181 is a wasteful number, since it uses less digits than its factorization.

117323181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106033 (or 106027 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 117323181 is about 10831.5825713512. The cubic root of 117323181 is about 489.5472438710.

Adding to 117323181 its reverse (181323711), we get a palindrome (298646892).

The spelling of 117323181 in words is "one hundred seventeen million, three hundred twenty-three thousand, one hundred eighty-one".