47181 has 4 divisors (see below), whose sum is σ = 62912. Its totient is φ = 31452.

The previous prime is 47161. The next prime is 47189. The reversal of 47181 is 18174.

47181 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 47181 - 2⁵ = 47149 is a prime.

It is a super-2 number, since 2×47181² = 4452093522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7861 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (15728).

2⁴⁷¹⁸¹ is an apocalyptic number.

It is an amenable number.

47181 is a deficient number, since it is larger than the sum of its proper divisors (15731).

47181 is a wasteful number, since it uses less digits than its factorization.

47181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15730.

The product of its digits is 224, while the sum is 21.

The square root of 47181 is about 217.2118781282. The cubic root of 47181 is about 36.1345275254.

The spelling of 47181 in words is "forty-seven thousand, one hundred eighty-one".