2143553321305 has 12 divisors (see below), whose sum is σ = 2827364546916. Its totient is φ = 1558947869600.

The previous prime is 2143553321291. The next prime is 2143553321333. The reversal of 2143553321305 is 5031233553412.

It can be written as a sum of positive squares in 2 ways, for example, as 1084405657104 + 1059147664201 = 1041348^2 + 1029149^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2143553321305 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1771531066 + ... + 1771532275.

It is an arithmetic number, because the mean of its divisors is an integer number (235613712243).

Almost surely, 2^{2143553321305} is an apocalyptic number.

It is an amenable number.

2143553321305 is a deficient number, since it is larger than the sum of its proper divisors (683811225611).

2143553321305 is a wasteful number, since it uses less digits than its factorization.

2143553321305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543063368 (or 3543063357 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 37.

Adding to 2143553321305 its reverse (5031233553412), we get a palindrome (7174786874717).

The spelling of 2143553321305 in words is "two trillion, one hundred forty-three billion, five hundred fifty-three million, three hundred twenty-one thousand, three hundred five".