217640096 has 12 divisors (see below), whose sum is σ = 428479002. Its totient is φ = 108820032.

The previous prime is 217640081. The next prime is 217640123. The reversal of 217640096 is 690046712.

217640096 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 184416400 + 33223696 = 13580^2 + 5764^2 .

It is a super-2 number, since 2×217640096² = 94734422773778432, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3400595 + ... + 3400658.

Almost surely, 2^217640096 is an apocalyptic number.

It is an amenable number.

217640096 is a deficient number, since it is larger than the sum of its proper divisors (210838906).

217640096 is an equidigital number, since it uses as much as digits as its factorization.

217640096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6801263 (or 6801255 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 217640096 is about 14752.6301383855. The cubic root of 217640096 is about 601.5147799254.

The spelling of 217640096 in words is "two hundred seventeen million, six hundred forty thousand, ninety-six".