47217287 has 8 divisors (see below), whose sum is σ = 51712080. Its totient is φ = 42845760.

The previous prime is 47217271. The next prime is 47217293. The reversal of 47217287 is 78271274.

It is a happy number.

47217287 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 a cyclic number.

It is not a de Polignac number, because 47217287 - 2⁴ = 47217271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47217287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47210287) 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 7 ways as a sum of consecutive naturals, for example, 30014 + ... + 31547.

It is an arithmetic number, because the mean of its divisors is an integer number (6464010).

Almost surely, 2^47217287 is an apocalyptic number.

47217287 is a deficient number, since it is larger than the sum of its proper divisors (4494793).

47217287 is a wasteful number, since it uses less digits than its factorization.

47217287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61633.

The product of its digits is 43904, while the sum is 38.

The square root of 47217287 is about 6871.4836098182. The cubic root of 47217287 is about 361.4378886356.

The spelling of 47217287 in words is "forty-seven million, two hundred seventeen thousand, two hundred eighty-seven".