217282942 has 8 divisors (see below), whose sum is σ = 326009736. Its totient is φ = 108613032.

The previous prime is 217282931. The next prime is 217282979. The reversal of 217282942 is 249282712.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2853 + ... + 21040.

It is an arithmetic number, because the mean of its divisors is an integer number (40751217).

Almost surely, 2^217282942 is an apocalyptic number.

217282942 is a deficient number, since it is larger than the sum of its proper divisors (108726794).

217282942 is a wasteful number, since it uses less digits than its factorization.

217282942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28442.

The product of its digits is 32256, while the sum is 37.

The square root of 217282942 is about 14740.5204114373. The cubic root of 217282942 is about 601.1855651086.

The spelling of 217282942 in words is "two hundred seventeen million, two hundred eighty-two thousand, nine hundred forty-two".