221540886880 has 24 divisors (see below), whose sum is σ = 523390345632. Its totient is φ = 88616354688.

The previous prime is 221540886871. The next prime is 221540886923. The reversal of 221540886880 is 88688045122.

221540886880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221540886880² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 692315112 + ... + 692315431.

It is an arithmetic number, because the mean of its divisors is an integer number (21807931068).

Almost surely, 2^221540886880 is an apocalyptic number.

221540886880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221540886880 is an abundant number, since it is smaller than the sum of its proper divisors (301849458752).

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

221540886880 is a wasteful number, since it uses less digits than its factorization.

221540886880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384630558 (or 1384630550 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 52.

The spelling of 221540886880 in words is "two hundred twenty-one billion, five hundred forty million, eight hundred eighty-six thousand, eight hundred eighty".