1027218217 has 4 divisors (see below), whose sum is σ = 1087642836. Its totient is φ = 966793600.

The previous prime is 1027218107. The next prime is 1027218221. The reversal of 1027218217 is 7128127201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 725709721 + 301508496 = 26939^2 + 17364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027218217 - 2¹⁵ = 1027185449 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1027218287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30212284 + ... + 30212317.

It is an arithmetic number, because the mean of its divisors is an integer number (271910709).

Almost surely, 2^1027218217 is an apocalyptic number.

1027218217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1027218217 is a deficient number, since it is larger than the sum of its proper divisors (60424619).

1027218217 is an equidigital number, since it uses as much as digits as its factorization.

1027218217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60424618.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 1027218217 is about 32050.2451940699. The cubic root of 1027218217 is about 1008.9916469609.

The spelling of 1027218217 in words is "one billion, twenty-seven million, two hundred eighteen thousand, two hundred seventeen".