13031230331 has 4 divisors (see below), whose sum is σ = 14892834672. Its totient is φ = 11169625992.

The previous prime is 13031230321. The next prime is 13031230361. The reversal of 13031230331 is 13303213031.

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

It is not a de Polignac number, because 13031230331 - 2²² = 13027036027 is a prime.

It is a super-2 number, since 2×13031230331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13031230321) 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, 930802160 + ... + 930802173.

It is an arithmetic number, because the mean of its divisors is an integer number (3723208668).

Almost surely, 2^13031230331 is an apocalyptic number.

13031230331 is a deficient number, since it is larger than the sum of its proper divisors (1861604341).

13031230331 is an equidigital number, since it uses as much as digits as its factorization.

13031230331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861604340.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 13031230331 its reverse (13303213031), we get a palindrome (26334443362).

The spelling of 13031230331 in words is "thirteen billion, thirty-one million, two hundred thirty thousand, three hundred thirty-one".