181228141 has 2 divisors, whose sum is σ = 181228142. Its totient is φ = 181228140.

The previous prime is 181228129. The next prime is 181228169. The reversal of 181228141 is 141822181.

It is an a-pointer prime, because the next prime (181228169) can be obtained adding 181228141 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103612041 + 77616100 = 10179^2 + 8810^2 .

It is a cyclic number.

It is not a de Polignac number, because 181228141 - 2¹⁵ = 181195373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181228171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90614070 + 90614071.

It is an arithmetic number, because the mean of its divisors is an integer number (90614071).

Almost surely, 2^181228141 is an apocalyptic number.

It is an amenable number.

181228141 is a deficient number, since it is larger than the sum of its proper divisors (1).

181228141 is an equidigital number, since it uses as much as digits as its factorization.

181228141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 28.

The square root of 181228141 is about 13462.1001704786. The cubic root of 181228141 is about 565.9028465976.

The spelling of 181228141 in words is "one hundred eighty-one million, two hundred twenty-eight thousand, one hundred forty-one".