21443551015343 has 8 divisors (see below), whose sum is σ = 21763837548720. Its totient is φ = 21123271350720.

The previous prime is 21443551015321. The next prime is 21443551015409. The reversal of 21443551015343 is 34351015534412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21443551015343 - 2⁶ = 21443551015279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21443551015343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443553015343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4754003 + ... + 8092443.

It is an arithmetic number, because the mean of its divisors is an integer number (2720479693590).

Almost surely, 2^{21443551015343} is an apocalyptic number.

21443551015343 is a deficient number, since it is larger than the sum of its proper divisors (320286533377).

21443551015343 is an equidigital number, since it uses as much as digits as its factorization.

21443551015343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434377.

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 21443551015343 its reverse (34351015534412), we get a palindrome (55794566549755).

The spelling of 21443551015343 in words is "twenty-one trillion, four hundred forty-three billion, five hundred fifty-one million, fifteen thousand, three hundred forty-three".