13316531 has 4 divisors (see below), whose sum is σ = 13332432. Its totient is φ = 13300632.

The previous prime is 13316521. The next prime is 13316551. The reversal of 13316531 is 13561331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13561331 = 7 ⋅1937333.

It is a cyclic number.

It is not a de Polignac number, because 13316531 - 2⁶ = 13316467 is a prime.

It is a super-2 number, since 2×13316531² = 354659995747922, 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 = 13316497 and 13316506.

It is not an unprimeable number, because it can be changed into a prime (13316521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6620 + ... + 8393.

It is an arithmetic number, because the mean of its divisors is an integer number (3333108).

Almost surely, 2^13316531 is an apocalyptic number.

13316531 is a deficient number, since it is larger than the sum of its proper divisors (15901).

13316531 is an equidigital number, since it uses as much as digits as its factorization.

13316531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900.

The product of its digits is 810, while the sum is 23.

The square root of 13316531 is about 3649.1822371594. The cubic root of 13316531 is about 237.0265715844.

Adding to 13316531 its reverse (13561331), we get a palindrome (26877862).

The spelling of 13316531 in words is "thirteen million, three hundred sixteen thousand, five hundred thirty-one".