47905281 has 12 divisors (see below), whose sum is σ = 69260880. Its totient is φ = 31907160.

The previous prime is 47905271. The next prime is 47905309. The reversal of 47905281 is 18250974.

47905281 is a `hidden beast` number, since 47 + 90 + 528 + 1 = 666.

47905281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47905281 - 2⁷ = 47905153 is a prime.

It is a super-2 number, since 2×47905281² = 4589831895377922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47905271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12526 + ... + 15896.

It is an arithmetic number, because the mean of its divisors is an integer number (5771740).

Almost surely, 2^47905281 is an apocalyptic number.

It is an amenable number.

47905281 is a deficient number, since it is larger than the sum of its proper divisors (21355599).

47905281 is a wasteful number, since it uses less digits than its factorization.

47905281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4956 (or 4953 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 47905281 is about 6921.3640996555. The cubic root of 47905281 is about 363.1849113685.

The spelling of 47905281 in words is "forty-seven million, nine hundred five thousand, two hundred eighty-one".