221243424440432 has 40 divisors (see below), whose sum is σ = 433477779865200. Its totient is φ = 109378203832832.

The previous prime is 221243424440371. The next prime is 221243424440447. The reversal of 221243424440432 is 234044424342122.

It is a self number, because there is not a number n which added to its sum of digits gives 221243424440432.

It is a congruent number.

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, 452697419 + ... + 453185877.

It is an arithmetic number, because the mean of its divisors is an integer number (10836944496630).

Almost surely, 2^{221243424440432} is an apocalyptic number.

It is an amenable number.

221243424440432 is a deficient number, since it is larger than the sum of its proper divisors (212234355424768).

221243424440432 is a wasteful number, since it uses less digits than its factorization.

221243424440432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806633 (or 806627 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 41.

Adding to 221243424440432 its reverse (234044424342122), we get a palindrome (455287848782554).

The spelling of 221243424440432 in words is "two hundred twenty-one trillion, two hundred forty-three billion, four hundred twenty-four million, four hundred forty thousand, four hundred thirty-two".