1543220532013 has 4 divisors (see below), whose sum is σ = 1543231421020. Its totient is φ = 1543209643008.

The previous prime is 1543220531891. The next prime is 1543220532053. The reversal of 1543220532013 is 3102350223451.

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 425576179044 + 1117644352969 = 652362^2 + 1057187^2 .

It is a cyclic number.

It is not a de Polignac number, because 1543220532013 - 2¹³ = 1543220523821 is a prime.

It is a super-2 number, since 2×1543220532013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1543220532053) 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, 5229078 + ... + 5516311.

It is an arithmetic number, because the mean of its divisors is an integer number (385807855255).

Almost surely, 2^{1543220532013} is an apocalyptic number.

It is an amenable number.

1543220532013 is a deficient number, since it is larger than the sum of its proper divisors (10889007).

1543220532013 is a wasteful number, since it uses less digits than its factorization.

1543220532013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10889006.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 1543220532013 its reverse (3102350223451), we get a palindrome (4645570755464).

The spelling of 1543220532013 in words is "one trillion, five hundred forty-three billion, two hundred twenty million, five hundred thirty-two thousand, thirteen".