180812111 has 2 divisors, whose sum is σ = 180812112. Its totient is φ = 180812110.

The previous prime is 180812101. The next prime is 180812147. The reversal of 180812111 is 111218081.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180812111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180812101) 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, 90406055 + 90406056.

It is an arithmetic number, because the mean of its divisors is an integer number (90406056).

Almost surely, 2^180812111 is an apocalyptic number.

180812111 is a deficient number, since it is larger than the sum of its proper divisors (1).

180812111 is an equidigital number, since it uses as much as digits as its factorization.

180812111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 23.

The square root of 180812111 is about 13446.6393942873. The cubic root of 180812111 is about 565.4694831692.

The spelling of 180812111 in words is "one hundred eighty million, eight hundred twelve thousand, one hundred eleven".