216134471 has 8 divisors (see below), whose sum is σ = 247100064. Its totient is φ = 185191200.

The previous prime is 216134461. The next prime is 216134489. The reversal of 216134471 is 174431612.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216134471 is a prime.

It is a super-3 number, since 3×216134471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216134461) 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, 32681 + ... + 38733.

It is an arithmetic number, because the mean of its divisors is an integer number (30887508).

Almost surely, 2^216134471 is an apocalyptic number.

216134471 is a deficient number, since it is larger than the sum of its proper divisors (30965593).

216134471 is an equidigital number, since it uses as much as digits as its factorization.

216134471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11161.

The product of its digits is 4032, while the sum is 29.

The square root of 216134471 is about 14701.5125412319. The cubic root of 216134471 is about 600.1244843561.

The spelling of 216134471 in words is "two hundred sixteen million, one hundred thirty-four thousand, four hundred seventy-one".