181302223 has 2 divisors, whose sum is σ = 181302224. Its totient is φ = 181302222.

The previous prime is 181302217. The next prime is 181302239. The reversal of 181302223 is 322203181.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181302223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181302194 and 181302203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181302323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90651111 + 90651112.

It is an arithmetic number, because the mean of its divisors is an integer number (90651112).

Almost surely, 2^181302223 is an apocalyptic number.

181302223 is a deficient number, since it is larger than the sum of its proper divisors (1).

181302223 is an equidigital number, since it uses as much as digits as its factorization.

181302223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 181302223 is about 13464.8513916790. The cubic root of 181302223 is about 565.9799455576.

The spelling of 181302223 in words is "one hundred eighty-one million, three hundred two thousand, two hundred twenty-three".