181001361 has 8 divisors (see below), whose sum is σ = 241894240. Its totient is φ = 120388032.

The previous prime is 181001357. The next prime is 181001369. The reversal of 181001361 is 163100181.

181001361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 181001361 - 2² = 181001357 is a prime.

It is a super-2 number, since 2×181001361² = 65522985367704642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181001369) 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, 68371 + ... + 70968.

It is an arithmetic number, because the mean of its divisors is an integer number (30236780).

Almost surely, 2^181001361 is an apocalyptic number.

It is an amenable number.

181001361 is a deficient number, since it is larger than the sum of its proper divisors (60892879).

181001361 is a wasteful number, since it uses less digits than its factorization.

181001361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139775.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 181001361 is about 13453.6746281453. The cubic root of 181001361 is about 565.6667003880. Note that the first 3 decimals are identical.

The spelling of 181001361 in words is "one hundred eighty-one million, one thousand, three hundred sixty-one".