2543221135412 has 6 divisors (see below), whose sum is σ = 4450636986978. Its totient is φ = 1271610567704.

The previous prime is 2543221135337. The next prime is 2543221135459. The reversal of 2543221135412 is 2145311223452.

It can be written as a sum of positive squares in only one way, i.e., 2507453248036 + 35767887376 = 1583494^2 + 189124^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317902641923 + ... + 317902641930.

It is an arithmetic number, because the mean of its divisors is an integer number (741772831163).

Almost surely, 2^{2543221135412} is an apocalyptic number.

It is an amenable number.

2543221135412 is a deficient number, since it is larger than the sum of its proper divisors (1907415851566).

2543221135412 is a wasteful number, since it uses less digits than its factorization.

2543221135412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635805283857 (or 635805283855 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

Adding to 2543221135412 its reverse (2145311223452), we get a palindrome (4688532358864).

The spelling of 2543221135412 in words is "two trillion, five hundred forty-three billion, two hundred twenty-one million, one hundred thirty-five thousand, four hundred twelve".