180071081 has 2 divisors, whose sum is σ = 180071082. Its totient is φ = 180071080.

The previous prime is 180071077. The next prime is 180071197. The reversal of 180071081 is 180170081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161061481 + 19009600 = 12691^2 + 4360^2 .

It is a cyclic number.

It is not a de Polignac number, because 180071081 - 2² = 180071077 is a prime.

It is a super-2 number, since 2×180071081² = 64851188425017122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 180071081.

It is not a weakly prime, because it can be changed into another prime (180071681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90035540 + 90035541.

It is an arithmetic number, because the mean of its divisors is an integer number (90035541).

Almost surely, 2^180071081 is an apocalyptic number.

It is an amenable number.

180071081 is a deficient number, since it is larger than the sum of its proper divisors (1).

180071081 is an equidigital number, since it uses as much as digits as its factorization.

180071081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 180071081 is about 13419.0566359935. The cubic root of 180071081 is about 564.6959295276.

The spelling of 180071081 in words is "one hundred eighty million, seventy-one thousand, eighty-one".