221965521882 has 32 divisors (see below), whose sum is σ = 478919891520. Its totient is φ = 68177040000.

The previous prime is 221965521847. The next prime is 221965521889. The reversal of 221965521882 is 288125569122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221965521889) 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, 2456244 + ... + 2545007.

It is an arithmetic number, because the mean of its divisors is an integer number (14966246610).

Almost surely, 2^221965521882 is an apocalyptic number.

221965521882 is an abundant number, since it is smaller than the sum of its proper divisors (256954369638).

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

221965521882 is a wasteful number, since it uses less digits than its factorization.

221965521882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001838.

The product of its digits is 1382400, while the sum is 51.

The spelling of 221965521882 in words is "two hundred twenty-one billion, nine hundred sixty-five million, five hundred twenty-one thousand, eight hundred eighty-two".