221442364543424 has 14 divisors (see below), whose sum is σ = 439424692140984. Its totient is φ = 110721182271680.

The previous prime is 221442364543417. The next prime is 221442364543487. The reversal of 221442364543424 is 424345463244122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1730018472932 + ... + 1730018473059.

Almost surely, 2^{221442364543424} is an apocalyptic number.

It is an amenable number.

221442364543424 is a deficient number, since it is larger than the sum of its proper divisors (217982327597560).

221442364543424 is an equidigital number, since it uses as much as digits as its factorization.

221442364543424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460036946003 (or 3460036945993 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 50.

The spelling of 221442364543424 in words is "two hundred twenty-one trillion, four hundred forty-two billion, three hundred sixty-four million, five hundred forty-three thousand, four hundred twenty-four".