221454433344 has 56 divisors (see below), whose sum is σ = 589663649728. Its totient is φ = 73347955200.

The previous prime is 221454433337. The next prime is 221454433381. The reversal of 221454433344 is 443334454122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3643132 + ... + 3703419.

Almost surely, 2^221454433344 is an apocalyptic number.

221454433344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221454433344 is an abundant number, since it is smaller than the sum of its proper divisors (368209216384).

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

221454433344 is a wasteful number, since it uses less digits than its factorization.

221454433344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346723 (or 7346713 counting only the distinct ones).

The product of its digits is 552960, while the sum is 39.

Adding to 221454433344 its reverse (443334454122), we get a palindrome (664788887466).

The spelling of 221454433344 in words is "two hundred twenty-one billion, four hundred fifty-four million, four hundred thirty-three thousand, three hundred forty-four".