181107541 has 2 divisors, whose sum is σ = 181107542. Its totient is φ = 181107540.

The previous prime is 181107503. The next prime is 181107547. The reversal of 181107541 is 145701181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165662641 + 15444900 = 12871^2 + 3930^2 .

It is a cyclic number.

It is not a de Polignac number, because 181107541 - 2²⁷ = 46889813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181107547) 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, 90553770 + 90553771.

It is an arithmetic number, because the mean of its divisors is an integer number (90553771).

Almost surely, 2^181107541 is an apocalyptic number.

It is an amenable number.

181107541 is a deficient number, since it is larger than the sum of its proper divisors (1).

181107541 is an equidigital number, since it uses as much as digits as its factorization.

181107541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 28.

The square root of 181107541 is about 13457.6201833757. The cubic root of 181107541 is about 565.7772902551. Note that the first 3 decimals are identical.

It can be divided in two parts, 18110 and 7541, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 181107541 in words is "one hundred eighty-one million, one hundred seven thousand, five hundred forty-one".