180811 has 2 divisors, whose sum is σ = 180812. Its totient is φ = 180810.

The previous prime is 180799. The next prime is 180847. The reversal of 180811 is 118081.

It is a weak prime.

It is an emirp because it is prime and its reverse (118081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180811 - 2⁵ = 180779 is a prime.

It is a Chen prime.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is not a weakly prime, because it can be changed into another prime (180871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90405 + 90406.

It is an arithmetic number, because the mean of its divisors is an integer number (90406).

2¹⁸⁰⁸¹¹ is an apocalyptic number.

180811 is the 246-th hex number.

180811 is a deficient number, since it is larger than the sum of its proper divisors (1).

180811 is an equidigital number, since it uses as much as digits as its factorization.

180811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 180811 is about 425.2187672246. The cubic root of 180811 is about 56.5468324991.

Adding to 180811 its reverse (118081), we get a palindrome (298892).

The spelling of 180811 in words is "one hundred eighty thousand, eight hundred eleven".