217151368 has 16 divisors (see below), whose sum is σ = 465324480. Its totient is φ = 93064848.

The previous prime is 217151357. The next prime is 217151369. The reversal of 217151368 is 863151712.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (217151369) 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, 1938796 + ... + 1938907.

It is an arithmetic number, because the mean of its divisors is an integer number (29082780).

Almost surely, 2^217151368 is an apocalyptic number.

217151368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

217151368 is an abundant number, since it is smaller than the sum of its proper divisors (248173112).

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

217151368 is a wasteful number, since it uses less digits than its factorization.

217151368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877716 (or 3877712 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 217151368 is about 14736.0567317040. The cubic root of 217151368 is about 601.0641928548.

The spelling of 217151368 in words is "two hundred seventeen million, one hundred fifty-one thousand, three hundred sixty-eight".