215648793 has 12 divisors (see below), whose sum is σ = 311648688. Its totient is φ = 143693880.

The previous prime is 215648779. The next prime is 215648809. The reversal of 215648793 is 397846512.

215648793 is a `hidden beast` number, since 2 + 1 + 564 + 87 + 9 + 3 = 666.

It is not a de Polignac number, because 215648793 - 2⁴ = 215648777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215648753) 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, 18046 + ... + 27512.

It is an arithmetic number, because the mean of its divisors is an integer number (25970724).

Almost surely, 2^215648793 is an apocalyptic number.

It is an amenable number.

215648793 is a deficient number, since it is larger than the sum of its proper divisors (95999895).

215648793 is a wasteful number, since it uses less digits than its factorization.

215648793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12004 (or 12001 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 215648793 is about 14684.9852911060. The cubic root of 215648793 is about 599.6746319246.

The spelling of 215648793 in words is "two hundred fifteen million, six hundred forty-eight thousand, seven hundred ninety-three".