217002422 has 48 divisors (see below), whose sum is σ = 412830432. Its totient is φ = 83715840.

The previous prime is 217002403. The next prime is 217002473. The reversal of 217002422 is 224200712.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 217002394 and 217002403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95888 + ... + 98124.

It is an arithmetic number, because the mean of its divisors is an integer number (8600634).

Almost surely, 2^217002422 is an apocalyptic number.

217002422 is a deficient number, since it is larger than the sum of its proper divisors (195828010).

217002422 is a wasteful number, since it uses less digits than its factorization.

217002422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313 (or 2300 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 217002422 is about 14731.0020704635. The cubic root of 217002422 is about 600.9267363810.

The spelling of 217002422 in words is "two hundred seventeen million, two thousand, four hundred twenty-two".