13343131 has 4 divisors (see below), whose sum is σ = 13399200. Its totient is φ = 13287064.

The previous prime is 13343129. The next prime is 13343137. The reversal of 13343131 is 13134331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13134331 = 7 ⋅1876333.

It is a cyclic number.

It is not a de Polignac number, because 13343131 - 2¹ = 13343129 is a prime.

It is a super-2 number, since 2×13343131² = 356078289766322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13343099 and 13343108.

It is not an unprimeable number, because it can be changed into a prime (13343137) 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, 27676 + ... + 28153.

It is an arithmetic number, because the mean of its divisors is an integer number (3349800).

Almost surely, 2^13343131 is an apocalyptic number.

13343131 is a deficient number, since it is larger than the sum of its proper divisors (56069).

13343131 is an equidigital number, since it uses as much as digits as its factorization.

13343131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56068.

The product of its digits is 324, while the sum is 19.

The square root of 13343131 is about 3652.8250710922. The cubic root of 13343131 is about 237.1842881700.

Adding to 13343131 its reverse (13134331), we get a palindrome (26477462).

It can be divided in two parts, 1334 and 3131, that added together give a triangular number (4465 = T₉₄).

The spelling of 13343131 in words is "thirteen million, three hundred forty-three thousand, one hundred thirty-one".