221271806470 has 96 divisors (see below), whose sum is σ = 472554868320. Its totient is φ = 73947294720.

The previous prime is 221271806453. The next prime is 221271806473. The reversal of 221271806470 is 74608172122.

It is a super-2 number, since 2×221271806470² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221271806473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4231122 + ... + 4283098.

It is an arithmetic number, because the mean of its divisors is an integer number (4922446545).

Almost surely, 2^221271806470 is an apocalyptic number.

221271806470 is an abundant number, since it is smaller than the sum of its proper divisors (251283061850).

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

221271806470 is a wasteful number, since it uses less digits than its factorization.

221271806470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52250 (or 52237 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

Adding to 221271806470 its reverse (74608172122), we get a palindrome (295879978592).

The spelling of 221271806470 in words is "two hundred twenty-one billion, two hundred seventy-one million, eight hundred six thousand, four hundred seventy".