217193023506 has 32 divisors (see below), whose sum is σ = 441508002048. Its totient is φ = 71213812560.

The previous prime is 217193023501. The next prime is 217193023517. The reversal of 217193023506 is 605320391712.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (217193023501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113160 + ... + 668723.

It is an arithmetic number, because the mean of its divisors is an integer number (13797125064).

Almost surely, 2^217193023506 is an apocalyptic number.

217193023506 is an abundant number, since it is smaller than the sum of its proper divisors (224314978542).

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

217193023506 is a wasteful number, since it uses less digits than its factorization.

217193023506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782646.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 217193023506 in words is "two hundred seventeen billion, one hundred ninety-three million, twenty-three thousand, five hundred six".