13031316 has 72 divisors (see below), whose sum is σ = 35380800. Its totient is φ = 4029696.

The previous prime is 13031309. The next prime is 13031329. The reversal of 13031316 is 61313031.

13031316 = T₃₆₈ + T₃₆₉ + ... + T₅₀₃.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 65385 + ... + 65583.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^13031316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13031316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17690400).

13031316 is an abundant number, since it is smaller than the sum of its proper divisors (22349484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13031316 is a wasteful number, since it uses less digits than its factorization.

13031316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 13031316 is about 3609.8914111092. The cubic root of 13031316 is about 235.3221235145.

Adding to 13031316 its reverse (61313031), we get a palindrome (74344347).

The spelling of 13031316 in words is "thirteen million, thirty-one thousand, three hundred sixteen".