13213443031 has 4 divisors (see below), whose sum is σ = 13213771864. Its totient is φ = 13213114200.

The previous prime is 13213442941. The next prime is 13213443073. The reversal of 13213443031 is 13034431231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13213443031 is a prime.

It is a super-2 number, since 2×13213443031² (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 = 13213442987 and 13213443005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213449031) 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, 94125 + ... + 187846.

It is an arithmetic number, because the mean of its divisors is an integer number (3303442966).

Almost surely, 2^13213443031 is an apocalyptic number.

13213443031 is a deficient number, since it is larger than the sum of its proper divisors (328833).

13213443031 is an equidigital number, since it uses as much as digits as its factorization.

13213443031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328832.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 13213443031 its reverse (13034431231), we get a palindrome (26247874262).

The spelling of 13213443031 in words is "thirteen billion, two hundred thirteen million, four hundred forty-three thousand, thirty-one".