47115181 has 2 divisors, whose sum is σ = 47115182. Its totient is φ = 47115180.

The previous prime is 47115179. The next prime is 47115223. The reversal of 47115181 is 18151174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34928100 + 12187081 = 5910^2 + 3491^2 .

It is a cyclic number.

It is not a de Polignac number, because 47115181 - 2¹ = 47115179 is a prime.

It is a super-2 number, since 2×47115181² = 4439680561325522, which contains 22 as substring.

Together with 47115179, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47115121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23557590 + 23557591.

It is an arithmetic number, because the mean of its divisors is an integer number (23557591).

Almost surely, 2^47115181 is an apocalyptic number.

It is an amenable number.

47115181 is a deficient number, since it is larger than the sum of its proper divisors (1).

47115181 is an equidigital number, since it uses as much as digits as its factorization.

47115181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 28.

The square root of 47115181 is about 6864.0498978373. The cubic root of 47115181 is about 361.1771676625.

The spelling of 47115181 in words is "forty-seven million, one hundred fifteen thousand, one hundred eighty-one".