217055283 has 16 divisors (see below), whose sum is σ = 297831840. Its totient is φ = 140507136.

The previous prime is 217055281. The next prime is 217055291. The reversal of 217055283 is 382550712.

It is not a de Polignac number, because 217055283 - 2¹ = 217055281 is a prime.

It is a super-2 number, since 2×217055283² = 94225991756420178, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (217055281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62353 + ... + 65741.

It is an arithmetic number, because the mean of its divisors is an integer number (18614490).

Almost surely, 2^217055283 is an apocalyptic number.

217055283 is a deficient number, since it is larger than the sum of its proper divisors (80776557).

217055283 is a wasteful number, since it uses less digits than its factorization.

217055283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 217055283 is about 14732.7961704491. The cubic root of 217055283 is about 600.9755269413.

The spelling of 217055283 in words is "two hundred seventeen million, fifty-five thousand, two hundred eighty-three".