221423203432344 has 64 divisors (see below), whose sum is σ = 566813920083840. Its totient is φ = 72042597607680.

The previous prime is 221423203432339. The next prime is 221423203432369. The reversal of 221423203432344 is 443234302324122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70908262 + ... + 73965045.

It is an arithmetic number, because the mean of its divisors is an integer number (8856467501310).

Almost surely, 2^{221423203432344} is an apocalyptic number.

221423203432344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221423203432344 is an abundant number, since it is smaller than the sum of its proper divisors (345390716651496).

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

221423203432344 is a wasteful number, since it uses less digits than its factorization.

221423203432344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144874840 (or 144874836 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 39.

Adding to 221423203432344 its reverse (443234302324122), we get a palindrome (664657505756466).

The spelling of 221423203432344 in words is "two hundred twenty-one trillion, four hundred twenty-three billion, two hundred three million, four hundred thirty-two thousand, three hundred forty-four".