217300842 has 48 divisors (see below), whose sum is σ = 516847968. Its totient is φ = 65435040.

The previous prime is 217300841. The next prime is 217300873. The reversal of 217300842 is 248003712.

It is not an unprimeable number, because it can be changed into a prime (217300841) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 28908 + ... + 35640.

It is an arithmetic number, because the mean of its divisors is an integer number (10767666).

Almost surely, 2^217300842 is an apocalyptic number.

217300842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 217300842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258423984).

217300842 is an abundant number, since it is smaller than the sum of its proper divisors (299547126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217300842 is a wasteful number, since it uses less digits than its factorization.

217300842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6915 (or 6912 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 217300842 is about 14741.1275688124. The cubic root of 217300842 is about 601.2020734242.

The spelling of 217300842 in words is "two hundred seventeen million, three hundred thousand, eight hundred forty-two".