221448882828 has 24 divisors (see below), whose sum is σ = 516725298432. Its totient is φ = 73814688784.

The previous prime is 221448882791. The next prime is 221448882887. The reversal of 221448882828 is 828288844122.

221448882828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461401 + ... + 809807.

It is an arithmetic number, because the mean of its divisors is an integer number (21530220768).

Almost surely, 2^221448882828 is an apocalyptic number.

It is an amenable number.

221448882828 is an abundant number, since it is smaller than the sum of its proper divisors (295276415604).

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

221448882828 is a wasteful number, since it uses less digits than its factorization.

221448882828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401381 (or 401379 counting only the distinct ones).

The product of its digits is 8388608, while the sum is 57.

The spelling of 221448882828 in words is "two hundred twenty-one billion, four hundred forty-eight million, eight hundred eighty-two thousand, eight hundred twenty-eight".