180001381 has 8 divisors (see below), whose sum is σ = 214660224. Its totient is φ = 147578640.

The previous prime is 180001379. The next prime is 180001391. The reversal of 180001381 is 183100081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 180001381 - 2¹ = 180001379 is a prime.

It is a super-2 number, since 2×180001381² = 64800994323814322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180001331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558850 + ... + 559171.

It is an arithmetic number, because the mean of its divisors is an integer number (26832528).

Almost surely, 2^180001381 is an apocalyptic number.

It is an amenable number.

180001381 is a deficient number, since it is larger than the sum of its proper divisors (34658843).

180001381 is a wasteful number, since it uses less digits than its factorization.

180001381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118051.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 180001381 is about 13416.4593317313. The cubic root of 180001381 is about 564.6230612924.

The spelling of 180001381 in words is "one hundred eighty million, one thousand, three hundred eighty-one".