13031033231 has 4 divisors (see below), whose sum is σ = 13160053464. Its totient is φ = 12902013000.

The previous prime is 13031033189. The next prime is 13031033243. The reversal of 13031033231 is 13233013031.

13031033231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13031033231 - 2²² = 13026838927 is a prime.

It is a super-2 number, since 2×13031033231² (a number of 21 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 (13031033261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64509965 + ... + 64510166.

It is an arithmetic number, because the mean of its divisors is an integer number (3290013366).

Almost surely, 2^13031033231 is an apocalyptic number.

13031033231 is a deficient number, since it is larger than the sum of its proper divisors (129020233).

13031033231 is a wasteful number, since it uses less digits than its factorization.

13031033231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129020232.

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

Adding to 13031033231 its reverse (13233013031), we get a palindrome (26264046262).

The spelling of 13031033231 in words is "thirteen billion, thirty-one million, thirty-three thousand, two hundred thirty-one".