216280471 has 8 divisors (see below), whose sum is σ = 237506688. Its totient is φ = 195315000.

The previous prime is 216280423. The next prime is 216280517. The reversal of 216280471 is 174082612.

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

It is a cyclic number.

It is not a de Polignac number, because 216280471 - 2⁷ = 216280343 is a prime.

It is a super-3 number, since 3×216280471³ (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 (216200471) 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, 63445 + ... + 66766.

It is an arithmetic number, because the mean of its divisors is an integer number (29688336).

Almost surely, 2^216280471 is an apocalyptic number.

216280471 is a deficient number, since it is larger than the sum of its proper divisors (21226217).

216280471 is a wasteful number, since it uses less digits than its factorization.

216280471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130373.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 216280471 is about 14706.4771784408. The cubic root of 216280471 is about 600.2595830486.

The spelling of 216280471 in words is "two hundred sixteen million, two hundred eighty thousand, four hundred seventy-one".