13203445531 has 16 divisors (see below), whose sum is σ = 13661996544. Its totient is φ = 12752649184.

The previous prime is 13203445529. The next prime is 13203445561. The reversal of 13203445531 is 13554430231.

It is a cyclic number.

It is not a de Polignac number, because 13203445531 - 2¹ = 13203445529 is a prime.

It is a super-2 number, since 2×13203445531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13203445493 and 13203445502.

It is not an unprimeable number, because it can be changed into a prime (13203445501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5823060 + ... + 5825326.

It is an arithmetic number, because the mean of its divisors is an integer number (853874784).

Almost surely, 2^13203445531 is an apocalyptic number.

13203445531 is a deficient number, since it is larger than the sum of its proper divisors (458551013).

13203445531 is a wasteful number, since it uses less digits than its factorization.

13203445531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890.

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

Adding to 13203445531 its reverse (13554430231), we get a palindrome (26757875762).

The spelling of 13203445531 in words is "thirteen billion, two hundred three million, four hundred forty-five thousand, five hundred thirty-one".