215047147 has 4 divisors (see below), whose sum is σ = 245768176. Its totient is φ = 184326120.

The previous prime is 215047121. The next prime is 215047163. The reversal of 215047147 is 741740512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215047147 - 2¹¹ = 215045099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215047177) 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 in 3 ways as a sum of consecutive naturals, for example, 15360504 + ... + 15360517.

It is an arithmetic number, because the mean of its divisors is an integer number (61442044).

Almost surely, 2^215047147 is an apocalyptic number.

215047147 is a deficient number, since it is larger than the sum of its proper divisors (30721029).

215047147 is an equidigital number, since it uses as much as digits as its factorization.

215047147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30721028.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 215047147 is about 14664.4859098435. The cubic root of 215047147 is about 599.1164281771.

Adding to 215047147 its reverse (741740512), we get a palindrome (956787659).

The spelling of 215047147 in words is "two hundred fifteen million, forty-seven thousand, one hundred forty-seven".