221434243232 has 12 divisors (see below), whose sum is σ = 435948666426. Its totient is φ = 110717121600.

The previous prime is 221434243201. The next prime is 221434243279. The reversal of 221434243232 is 232342434122.

It can be written as a sum of positive squares in only one way, i.e., 177918614416 + 43515628816 = 421804^2 + 208604^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 6919820101 = 221434243232 / (2 + 2 + 1 + 4 + 3 + 4 + 2 + 4 + 3 + 2 + 3 + 2).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3459910019 + ... + 3459910082.

Almost surely, 2^221434243232 is an apocalyptic number.

It is an amenable number.

221434243232 is a deficient number, since it is larger than the sum of its proper divisors (214514423194).

221434243232 is an equidigital number, since it uses as much as digits as its factorization.

221434243232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6919820111 (or 6919820103 counting only the distinct ones).

The product of its digits is 55296, while the sum is 32.

Adding to 221434243232 its reverse (232342434122), we get a palindrome (453776677354).

The spelling of 221434243232 in words is "two hundred twenty-one billion, four hundred thirty-four million, two hundred forty-three thousand, two hundred thirty-two".