221455144140 has 96 divisors (see below), whose sum is σ = 623853510336. Its totient is φ = 58695352320.

The previous prime is 221455144123. The next prime is 221455144147. The reversal of 221455144140 is 41441554122.

221455144140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221455144147) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 13667884 + ... + 13684076.

It is an arithmetic number, because the mean of its divisors is an integer number (6498474066).

Almost surely, 2^221455144140 is an apocalyptic number.

221455144140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221455144140 is an abundant number, since it is smaller than the sum of its proper divisors (402398366196).

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

221455144140 is a wasteful number, since it uses less digits than its factorization.

221455144140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17579 (or 17577 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 33.

Adding to 221455144140 its reverse (41441554122), we get a palindrome (262896698262).

The spelling of 221455144140 in words is "two hundred twenty-one billion, four hundred fifty-five million, one hundred forty-four thousand, one hundred forty".