217408097 has 8 divisors (see below), whose sum is σ = 222216000. Its totient is φ = 212637744.

The previous prime is 217408091. The next prime is 217408109. The reversal of 217408097 is 790804712.

217408097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 217408097 - 2¹⁸ = 217145953 is a prime.

It is a super-2 number, since 2×217408097² = 94532561282322818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 217408097.

It is not an unprimeable number, because it can be changed into a prime (217408091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2483 + ... + 20999.

It is an arithmetic number, because the mean of its divisors is an integer number (27777000).

Almost surely, 2^217408097 is an apocalyptic number.

It is an amenable number.

217408097 is a deficient number, since it is larger than the sum of its proper divisors (4807903).

217408097 is a wasteful number, since it uses less digits than its factorization.

217408097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18775.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 217408097 is about 14744.7650710345. The cubic root of 217408097 is about 601.3009706055.

The spelling of 217408097 in words is "two hundred seventeen million, four hundred eight thousand, ninety-seven".