13217555471 has 4 divisors (see below), whose sum is σ = 13995058752. Its totient is φ = 12440052192.

The previous prime is 13217555423. The next prime is 13217555501. The reversal of 13217555471 is 17455571231.

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

It is not a de Polignac number, because 13217555471 - 2¹⁰ = 13217554447 is a prime.

It is a super-3 number, since 3×13217555471³ (a number of 31 digits) contains 333 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 (13217555671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388751615 + ... + 388751648.

It is an arithmetic number, because the mean of its divisors is an integer number (3498764688).

Almost surely, 2^13217555471 is an apocalyptic number.

13217555471 is a deficient number, since it is larger than the sum of its proper divisors (777503281).

13217555471 is an equidigital number, since it uses as much as digits as its factorization.

13217555471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777503280.

The product of its digits is 147000, while the sum is 41.

The spelling of 13217555471 in words is "thirteen billion, two hundred seventeen million, five hundred fifty-five thousand, four hundred seventy-one".