217296749238 has 16 divisors (see below), whose sum is σ = 434599669296. Its totient is φ = 72431221280.

The previous prime is 217296749207. The next prime is 217296749249. The reversal of 217296749238 is 832947692712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290320 + ... + 720332.

It is an arithmetic number, because the mean of its divisors is an integer number (27162479331).

Almost surely, 2^217296749238 is an apocalyptic number.

217296749238 is an abundant number, since it is smaller than the sum of its proper divisors (217302920058).

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

217296749238 is a wasteful number, since it uses less digits than its factorization.

217296749238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514239.

The product of its digits is 18289152, while the sum is 60.

The spelling of 217296749238 in words is "two hundred seventeen billion, two hundred ninety-six million, seven hundred forty-nine thousand, two hundred thirty-eight".