13031516 has 6 divisors (see below), whose sum is σ = 22805160. Its totient is φ = 6515756.

The previous prime is 13031509. The next prime is 13031519. The reversal of 13031516 is 61513031.

It is a happy number.

13031516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628936 + ... + 1628943.

It is an arithmetic number, because the mean of its divisors is an integer number (3800860).

Almost surely, 2^13031516 is an apocalyptic number.

It is an amenable number.

13031516 is a deficient number, since it is larger than the sum of its proper divisors (9773644).

13031516 is a wasteful number, since it uses less digits than its factorization.

13031516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257883 (or 3257881 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 13031516 is about 3609.9191126672. The cubic root of 13031516 is about 235.3233273884.

Adding to 13031516 its reverse (61513031), we get a palindrome (74544547).

The spelling of 13031516 in words is "thirteen million, thirty-one thousand, five hundred sixteen".