217234290426 has 8 divisors (see below), whose sum is σ = 434468580864. Its totient is φ = 72411430140.

The previous prime is 217234290349. The next prime is 217234290439. The reversal of 217234290426 is 624092432712.

217234290426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

217234290426 is an admirable number.

It is a super-2 number, since 2×217234290426² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 18102857530 + ... + 18102857541.

It is an arithmetic number, because the mean of its divisors is an integer number (54308572608).

Almost surely, 2^217234290426 is an apocalyptic number.

217234290426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

217234290426 is a wasteful number, since it uses less digits than its factorization.

217234290426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36205715076.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 217234290426 in words is "two hundred seventeen billion, two hundred thirty-four million, two hundred ninety thousand, four hundred twenty-six".