221546985860 has 12 divisors (see below), whose sum is σ = 465248670348. Its totient is φ = 88618794336.

The previous prime is 221546985857. The next prime is 221546985883. The reversal of 221546985860 is 68589645122.

It is a happy number.

221546985860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 112049528644 + 109497457216 = 334738^2 + 330904^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221546985796 and 221546985805.

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 3 ways as a sum of consecutive naturals, for example, 5538674627 + ... + 5538674666.

It is an arithmetic number, because the mean of its divisors is an integer number (38770722529).

Almost surely, 2^221546985860 is an apocalyptic number.

221546985860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221546985860 is an abundant number, since it is smaller than the sum of its proper divisors (243701684488).

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

221546985860 is a wasteful number, since it uses less digits than its factorization.

221546985860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077349302 (or 11077349300 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 56.

The spelling of 221546985860 in words is "two hundred twenty-one billion, five hundred forty-six million, nine hundred eighty-five thousand, eight hundred sixty".