217090268 has 12 divisors (see below), whose sum is σ = 383825232. Its totient is φ = 107425920.

The previous prime is 217090243. The next prime is 217090271. The reversal of 217090268 is 862090712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279368 + ... + 280143.

It is an arithmetic number, because the mean of its divisors is an integer number (31985436).

Almost surely, 2^217090268 is an apocalyptic number.

It is an amenable number.

217090268 is a deficient number, since it is larger than the sum of its proper divisors (166734964).

217090268 is a wasteful number, since it uses less digits than its factorization.

217090268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559612 (or 559610 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 217090268 is about 14733.9834396541. The cubic root of 217090268 is about 601.0078136457.

The spelling of 217090268 in words is "two hundred seventeen million, ninety thousand, two hundred sixty-eight".