216473511 has 8 divisors (see below), whose sum is σ = 288707440. Its totient is φ = 144277632.

The previous prime is 216473507. The next prime is 216473513. The reversal of 216473511 is 115374612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216473511 - 2² = 216473507 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 (216473513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8805 + ... + 22593.

It is an arithmetic number, because the mean of its divisors is an integer number (36088430).

Almost surely, 2^216473511 is an apocalyptic number.

216473511 is a deficient number, since it is larger than the sum of its proper divisors (72233929).

216473511 is a wasteful number, since it uses less digits than its factorization.

216473511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19025.

The product of its digits is 5040, while the sum is 30.

The square root of 216473511 is about 14713.0388091652. The cubic root of 216473511 is about 600.4381161237.

The spelling of 216473511 in words is "two hundred sixteen million, four hundred seventy-three thousand, five hundred eleven".