1543213215205 has 4 divisors (see below), whose sum is σ = 1851855858252. Its totient is φ = 1234570572160.

The previous prime is 1543213215197. The next prime is 1543213215241. The reversal of 1543213215205 is 5025123123451.

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

It can be written as a sum of positive squares in 2 ways, for example, as 967250613121 + 575962602084 = 983489^2 + 758922^2 .

It is not a de Polignac number, because 1543213215205 - 2³ = 1543213215197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154321321516 + ... + 154321321525.

It is an arithmetic number, because the mean of its divisors is an integer number (462963964563).

Almost surely, 2^{1543213215205} is an apocalyptic number.

It is an amenable number.

1543213215205 is a deficient number, since it is larger than the sum of its proper divisors (308642643047).

1543213215205 is an equidigital number, since it uses as much as digits as its factorization.

1543213215205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308642643046.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 1543213215205 its reverse (5025123123451), we get a palindrome (6568336338656).

The spelling of 1543213215205 in words is "one trillion, five hundred forty-three billion, two hundred thirteen million, two hundred fifteen thousand, two hundred five".