217055203351 has 4 divisors (see below), whose sum is σ = 248063089552. Its totient is φ = 186047317152.

The previous prime is 217055203333. The next prime is 217055203381. The reversal of 217055203351 is 153302550712.

217055203351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 217055203351 - 2¹⁵ = 217055170583 is a prime.

It is a super-2 number, since 2×217055203351² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217055203381) by changing a digit.

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, 15503943090 + ... + 15503943103.

It is an arithmetic number, because the mean of its divisors is an integer number (62015772388).

Almost surely, 2^217055203351 is an apocalyptic number.

217055203351 is a deficient number, since it is larger than the sum of its proper divisors (31007886201).

217055203351 is an equidigital number, since it uses as much as digits as its factorization.

217055203351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31007886200.

The product of its (nonzero) digits is 31500, while the sum is 34.

The spelling of 217055203351 in words is "two hundred seventeen billion, fifty-five million, two hundred three thousand, three hundred fifty-one".