13243530331 has 4 divisors (see below), whose sum is σ = 13253511712. Its totient is φ = 13233548952.

The previous prime is 13243530323. The next prime is 13243530401. The reversal of 13243530331 is 13303534231.

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

It is a cyclic number.

It is not a de Polignac number, because 13243530331 - 2³ = 13243530323 is a prime.

It is a super-2 number, since 2×13243530331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13243530331.

It is not an unprimeable number, because it can be changed into a prime (13243530301) 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, 4988700 + ... + 4991353.

It is an arithmetic number, because the mean of its divisors is an integer number (3313377928).

Almost surely, 2^13243530331 is an apocalyptic number.

13243530331 is a deficient number, since it is larger than the sum of its proper divisors (9981381).

13243530331 is an equidigital number, since it uses as much as digits as its factorization.

13243530331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9981380.

The product of its (nonzero) digits is 9720, while the sum is 28.

The spelling of 13243530331 in words is "thirteen billion, two hundred forty-three million, five hundred thirty thousand, three hundred thirty-one".