13003031231 has 4 divisors (see below), whose sum is σ = 13197106392. Its totient is φ = 12808956072.

The previous prime is 13003031221. The next prime is 13003031263. The reversal of 13003031231 is 13213030031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13213030031 = 109 ⋅121220459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13003031231 is a prime.

It is a super-2 number, since 2×13003031231² (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 (13003031221) 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, 97037480 + ... + 97037613.

It is an arithmetic number, because the mean of its divisors is an integer number (3299276598).

Almost surely, 2^13003031231 is an apocalyptic number.

13003031231 is a deficient number, since it is larger than the sum of its proper divisors (194075161).

13003031231 is an equidigital number, since it uses as much as digits as its factorization.

13003031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194075160.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 13003031231 its reverse (13213030031), we get a palindrome (26216061262).

The spelling of 13003031231 in words is "thirteen billion, three million, thirty-one thousand, two hundred thirty-one".