15421053335243 has 4 divisors (see below), whose sum is σ = 15421326287280. Its totient is φ = 15420780383208.

The previous prime is 15421053335231. The next prime is 15421053335263. The reversal of 15421053335243 is 34253335012451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15421053335243 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 15421053335243.

It is not an unprimeable number, because it can be changed into a prime (15421053335203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136391255 + ... + 136504272.

It is an arithmetic number, because the mean of its divisors is an integer number (3855331571820).

Almost surely, 2^{15421053335243} is an apocalyptic number.

15421053335243 is a deficient number, since it is larger than the sum of its proper divisors (272952037).

15421053335243 is an equidigital number, since it uses as much as digits as its factorization.

15421053335243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272952036.

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 15421053335243 its reverse (34253335012451), we get a palindrome (49674388347694).

The spelling of 15421053335243 in words is "fifteen trillion, four hundred twenty-one billion, fifty-three million, three hundred thirty-five thousand, two hundred forty-three".