216948671 has 4 divisors (see below), whose sum is σ = 222240144. Its totient is φ = 211657200.

The previous prime is 216948661. The next prime is 216948703. The reversal of 216948671 is 176849612.

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 216948671 - 2⁶ = 216948607 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 (216948601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2645675 + ... + 2645756.

It is an arithmetic number, because the mean of its divisors is an integer number (55560036).

Almost surely, 2^216948671 is an apocalyptic number.

216948671 is a deficient number, since it is larger than the sum of its proper divisors (5291473).

216948671 is an equidigital number, since it uses as much as digits as its factorization.

216948671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5291472.

The product of its digits is 145152, while the sum is 44.

The square root of 216948671 is about 14729.1775398357. The cubic root of 216948671 is about 600.8771162278.

The spelling of 216948671 in words is "two hundred sixteen million, nine hundred forty-eight thousand, six hundred seventy-one".