181430143 has 2 divisors, whose sum is σ = 181430144. Its totient is φ = 181430142.

The previous prime is 181430099. The next prime is 181430159. The reversal of 181430143 is 341034181.

It is a strong prime.

It is an emirp because it is prime and its reverse (341034181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181430143 - 2⁹ = 181429631 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181431143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90715071 + 90715072.

It is an arithmetic number, because the mean of its divisors is an integer number (90715072).

Almost surely, 2^181430143 is an apocalyptic number.

181430143 is a deficient number, since it is larger than the sum of its proper divisors (1).

181430143 is an equidigital number, since it uses as much as digits as its factorization.

181430143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 181430143 is about 13469.6006993526. The cubic root of 181430143 is about 566.1130256204.

The spelling of 181430143 in words is "one hundred eighty-one million, four hundred thirty thousand, one hundred forty-three".