216006475 has 6 divisors (see below), whose sum is σ = 267848060. Its totient is φ = 172805160.

The previous prime is 216006467. The next prime is 216006503. The reversal of 216006475 is 574600612.

It is a happy number.

It is not a de Polignac number, because 216006475 - 2³ = 216006467 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4320105 + ... + 4320154.

Almost surely, 2^216006475 is an apocalyptic number.

216006475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216006475 is a deficient number, since it is larger than the sum of its proper divisors (51841585).

216006475 is an equidigital number, since it uses as much as digits as its factorization.

216006475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8640269 (or 8640264 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 216006475 is about 14697.1587390216. The cubic root of 216006475 is about 600.0059953105.

The spelling of 216006475 in words is "two hundred sixteen million, six thousand, four hundred seventy-five".