217148084 has 24 divisors (see below), whose sum is σ = 394692480. Its totient is φ = 104457536.

The previous prime is 217148077. The next prime is 217148137. The reversal of 217148084 is 480841712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304 + ... + 20880.

It is an arithmetic number, because the mean of its divisors is an integer number (16445520).

Almost surely, 2^217148084 is an apocalyptic number.

It is an amenable number.

217148084 is a deficient number, since it is larger than the sum of its proper divisors (177544396).

217148084 is a wasteful number, since it uses less digits than its factorization.

217148084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19687 (or 19685 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 217148084 is about 14735.9453039159. The cubic root of 217148084 is about 601.0611628566.

Adding to 217148084 its reverse (480841712), we get a palindrome (697989796).

The spelling of 217148084 in words is "two hundred seventeen million, one hundred forty-eight thousand, eighty-four".