217272342 has 32 divisors (see below), whose sum is σ = 525837312. Its totient is φ = 58425984.

The previous prime is 217272331. The next prime is 217272361. The reversal of 217272342 is 243272712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151438 + ... + 152865.

It is an arithmetic number, because the mean of its divisors is an integer number (16432416).

Almost surely, 2^217272342 is an apocalyptic number.

217272342 is an abundant number, since it is smaller than the sum of its proper divisors (308564970).

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

217272342 is a wasteful number, since it uses less digits than its factorization.

217272342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304332.

The product of its digits is 9408, while the sum is 30.

The square root of 217272342 is about 14740.1608539391. The cubic root of 217272342 is about 601.1757888072.

The spelling of 217272342 in words is "two hundred seventeen million, two hundred seventy-two thousand, three hundred forty-two".