221534461474271 has 16 divisors (see below), whose sum is σ = 258997238166528. Its totient is φ = 187432211815200.

The previous prime is 221534461474259. The next prime is 221534461474321. The reversal of 221534461474271 is 172474164435122.

It is a de Polignac number, because none of the positive numbers 2^k-221534461474271 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 (221534461470271) 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, 11832832295 + ... + 11832851016.

It is an arithmetic number, because the mean of its divisors is an integer number (16187327385408).

Almost surely, 2^{221534461474271} is an apocalyptic number.

221534461474271 is a deficient number, since it is larger than the sum of its proper divisors (37462776692257).

221534461474271 is a wasteful number, since it uses less digits than its factorization.

221534461474271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23665683382.

The product of its digits is 9031680, while the sum is 53.

The spelling of 221534461474271 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred sixty-one million, four hundred seventy-four thousand, two hundred seventy-one".