217952963 has 8 divisors (see below), whose sum is σ = 219139536. Its totient is φ = 216770400.

The previous prime is 217952957. The next prime is 217952983. The reversal of 217952963 is 369259712.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217952963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217952923) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 193520 + ... + 194642.

It is an arithmetic number, because the mean of its divisors is an integer number (27392442).

Almost surely, 2^217952963 is an apocalyptic number.

217952963 is a deficient number, since it is larger than the sum of its proper divisors (1186573).

217952963 is a wasteful number, since it uses less digits than its factorization.

217952963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005.

The product of its digits is 204120, while the sum is 44.

The square root of 217952963 is about 14763.2301004895. The cubic root of 217952963 is about 601.8028763761.

The spelling of 217952963 in words is "two hundred seventeen million, nine hundred fifty-two thousand, nine hundred sixty-three".