221655752351317 has 8 divisors (see below), whose sum is σ = 222081032327616. Its totient is φ = 221230477963872.

The previous prime is 221655752351309. The next prime is 221655752351353. The reversal of 221655752351317 is 713153257556122.

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

It is a cyclic number.

It is not a de Polignac number, because 221655752351317 - 2³ = 221655752351309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221655752351387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82869273 + ... + 85502209.

It is an arithmetic number, because the mean of its divisors is an integer number (27760129040952).

Almost surely, 2^{221655752351317} is an apocalyptic number.

It is an amenable number.

221655752351317 is a deficient number, since it is larger than the sum of its proper divisors (425279976299).

221655752351317 is a wasteful number, since it uses less digits than its factorization.

221655752351317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794427.

The product of its digits is 13230000, while the sum is 55.

The spelling of 221655752351317 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, seven hundred fifty-two million, three hundred fifty-one thousand, three hundred seventeen".