181030117 has 2 divisors, whose sum is σ = 181030118. Its totient is φ = 181030116.

The previous prime is 181030103. The next prime is 181030121. The reversal of 181030117 is 711030181.

181030117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180257476 + 772641 = 13426^2 + 879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181030117 is a prime.

It is a super-2 number, since 2×181030117² = 65543806522067378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181030147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90515058 + 90515059.

It is an arithmetic number, because the mean of its divisors is an integer number (90515059).

Almost surely, 2^181030117 is an apocalyptic number.

It is an amenable number.

181030117 is a deficient number, since it is larger than the sum of its proper divisors (1).

181030117 is an equidigital number, since it uses as much as digits as its factorization.

181030117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 181030117 is about 13454.7432900074. The cubic root of 181030117 is about 565.6966549516.

Adding to 181030117 its reverse (711030181), we get a palindrome (892060298).

The spelling of 181030117 in words is "one hundred eighty-one million, thirty thousand, one hundred seventeen".