1543212221425 has 96 divisors (see below), whose sum is σ = 2257938768384. Its totient is φ = 1024458240000.

The previous prime is 1543212221423. The next prime is 1543212221437. The reversal of 1543212221425 is 5241222123451.

It is not a de Polignac number, because 1543212221425 - 2¹ = 1543212221423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1543212221423) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 291334377 + ... + 291339673.

It is an arithmetic number, because the mean of its divisors is an integer number (23520195504).

Almost surely, 2^{1543212221425} is an apocalyptic number.

It is an amenable number.

1543212221425 is a deficient number, since it is larger than the sum of its proper divisors (714726546959).

1543212221425 is a wasteful number, since it uses less digits than its factorization.

1543212221425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5779 (or 5774 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

Adding to 1543212221425 its reverse (5241222123451), we get a palindrome (6784434344876).

The spelling of 1543212221425 in words is "one trillion, five hundred forty-three billion, two hundred twelve million, two hundred twenty-one thousand, four hundred twenty-five".