221441403440 has 80 divisors (see below), whose sum is σ = 539674271136. Its totient is φ = 84406425600.

The previous prime is 221441403437. The next prime is 221441403451. The reversal of 221441403440 is 44304144122.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643991 + ... + 926070.

Almost surely, 2^221441403440 is an apocalyptic number.

221441403440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221441403440 is an abundant number, since it is smaller than the sum of its proper divisors (318232867696).

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

221441403440 is a wasteful number, since it uses less digits than its factorization.

221441403440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570158 (or 1570152 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 221441403440 its reverse (44304144122), we get a palindrome (265745547562).

The spelling of 221441403440 in words is "two hundred twenty-one billion, four hundred forty-one million, four hundred three thousand, four hundred forty".