217152842 has 8 divisors (see below), whose sum is σ = 326932032. Its totient is φ = 108175500.

The previous prime is 217152811. The next prime is 217152847. The reversal of 217152842 is 248251712.

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

It is a junction number, because it is equal to n+sod(n) for n = 217152799 and 217152808.

It is not an unprimeable number, because it can be changed into a prime (217152847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199784 + ... + 200867.

It is an arithmetic number, because the mean of its divisors is an integer number (40866504).

Almost surely, 2^217152842 is an apocalyptic number.

217152842 is a deficient number, since it is larger than the sum of its proper divisors (109779190).

217152842 is a wasteful number, since it uses less digits than its factorization.

217152842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400924.

The product of its digits is 8960, while the sum is 32.

The square root of 217152842 is about 14736.1067449988. The cubic root of 217152842 is about 601.0655528380.

The spelling of 217152842 in words is "two hundred seventeen million, one hundred fifty-two thousand, eight hundred forty-two".