180013481 has 2 divisors, whose sum is σ = 180013482. Its totient is φ = 180013480.

The previous prime is 180013453. The next prime is 180013487. The reversal of 180013481 is 184310081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99301225 + 80712256 = 9965^2 + 8984^2 .

It is a cyclic number.

It is not a de Polignac number, because 180013481 - 2⁶ = 180013417 is a prime.

It is a super-2 number, since 2×180013481² = 64809706683474722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 180013481.

It is not a weakly prime, because it can be changed into another prime (180013487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90006740 + 90006741.

It is an arithmetic number, because the mean of its divisors is an integer number (90006741).

Almost surely, 2^180013481 is an apocalyptic number.

It is an amenable number.

180013481 is a deficient number, since it is larger than the sum of its proper divisors (1).

180013481 is an equidigital number, since it uses as much as digits as its factorization.

180013481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 180013481 is about 13416.9102627990. The cubic root of 180013481 is about 564.6357126509.

The spelling of 180013481 in words is "one hundred eighty million, thirteen thousand, four hundred eighty-one".