181682401 has 8 divisors (see below), whose sum is σ = 186376320. Its totient is φ = 177023088.

The previous prime is 181682387. The next prime is 181682453. The reversal of 181682401 is 104286181.

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 181682401 - 2¹¹ = 181680353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181682471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2155 + ... + 19183.

It is an arithmetic number, because the mean of its divisors is an integer number (23297040).

Almost surely, 2^181682401 is an apocalyptic number.

It is an amenable number.

181682401 is a deficient number, since it is larger than the sum of its proper divisors (4693919).

181682401 is a wasteful number, since it uses less digits than its factorization.

181682401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17303.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 181682401 is about 13478.9614214152. The cubic root of 181682401 is about 566.3752760618.

The spelling of 181682401 in words is "one hundred eighty-one million, six hundred eighty-two thousand, four hundred one".