216276471 has 6 divisors (see below), whose sum is σ = 312399360. Its totient is φ = 144184308.

The previous prime is 216276421. The next prime is 216276493. The reversal of 216276471 is 174672612.

216276471 is a `hidden beast` number, since 2 + 1 + 6 + 2 + 7 + 647 + 1 = 666.

It is not a de Polignac number, because 216276471 - 2¹⁹ = 215752183 is a prime.

It is a super-3 number, since 3×216276471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216276421) 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 5 ways as a sum of consecutive naturals, for example, 12015351 + ... + 12015368.

It is an arithmetic number, because the mean of its divisors is an integer number (52066560).

Almost surely, 2^216276471 is an apocalyptic number.

216276471 is a deficient number, since it is larger than the sum of its proper divisors (96122889).

216276471 is a wasteful number, since it uses less digits than its factorization.

216276471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24030725 (or 24030722 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 216276471 is about 14706.3411833127. The cubic root of 216276471 is about 600.2558825247.

The spelling of 216276471 in words is "two hundred sixteen million, two hundred seventy-six thousand, four hundred seventy-one".