13213231031 has 48 divisors (see below), whose sum is σ = 18065525760. Its totient is φ = 9382988160.

The previous prime is 13213230949. The next prime is 13213231043. The reversal of 13213231031 is 13013231231.

It is not a de Polignac number, because 13213231031 - 2¹⁸ = 13212968887 is a prime.

It is a super-2 number, since 2×13213231031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13213230994 and 13213231012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213231051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1021601 + ... + 1034453.

It is an arithmetic number, because the mean of its divisors is an integer number (376365120).

Almost surely, 2^13213231031 is an apocalyptic number.

13213231031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13213231031 is a deficient number, since it is larger than the sum of its proper divisors (4852294729).

13213231031 is a wasteful number, since it uses less digits than its factorization.

13213231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12976 (or 12963 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13213231031 its reverse (13013231231), we get a palindrome (26226462262).

The spelling of 13213231031 in words is "thirteen billion, two hundred thirteen million, two hundred thirty-one thousand, thirty-one".