181075541 has 2 divisors, whose sum is σ = 181075542. Its totient is φ = 181075540.

The previous prime is 181075513. The next prime is 181075547. The reversal of 181075541 is 145570181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133864900 + 47210641 = 11570^2 + 6871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181075541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181075498 and 181075507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181075547) 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, 90537770 + 90537771.

It is an arithmetic number, because the mean of its divisors is an integer number (90537771).

Almost surely, 2^181075541 is an apocalyptic number.

It is an amenable number.

181075541 is a deficient number, since it is larger than the sum of its proper divisors (1).

181075541 is an equidigital number, since it uses as much as digits as its factorization.

181075541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 32.

The square root of 181075541 is about 13456.4312133641. The cubic root of 181075541 is about 565.7439657828.

The spelling of 181075541 in words is "one hundred eighty-one million, seventy-five thousand, five hundred forty-one".