47215317 has 4 divisors (see below), whose sum is σ = 62953760. Its totient is φ = 31476876.

The previous prime is 47215309. The next prime is 47215397. The reversal of 47215317 is 71351274.

47215317 is digitally balanced in base 2, because in such base 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 47215317 - 2³ = 47215309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47215397) 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 3 ways as a sum of consecutive naturals, for example, 7869217 + ... + 7869222.

It is an arithmetic number, because the mean of its divisors is an integer number (15738440).

Almost surely, 2^47215317 is an apocalyptic number.

It is an amenable number.

47215317 is a deficient number, since it is larger than the sum of its proper divisors (15738443).

47215317 is a wasteful number, since it uses less digits than its factorization.

47215317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15738442.

The product of its digits is 5880, while the sum is 30.

The square root of 47215317 is about 6871.3402622778. The cubic root of 47215317 is about 361.4328619276.

The spelling of 47215317 in words is "forty-seven million, two hundred fifteen thousand, three hundred seventeen".