13031530 has 32 divisors (see below), whose sum is σ = 24960960. Its totient is φ = 4884480.

The previous prime is 13031521. The next prime is 13031531. The reversal of 13031530 is 3513031.

13031530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13031531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20010 + ... + 20650.

It is an arithmetic number, because the mean of its divisors is an integer number (780030).

Almost surely, 2^13031530 is an apocalyptic number.

13031530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13031530 is a deficient number, since it is larger than the sum of its proper divisors (11929430).

13031530 is a wasteful number, since it uses less digits than its factorization.

13031530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 135, while the sum is 16.

The square root of 13031530 is about 3609.9210517683. The cubic root of 13031530 is about 235.3234116591.

Adding to 13031530 its reverse (3513031), we get a palindrome (16544561).

The spelling of 13031530 in words is "thirteen million, thirty-one thousand, five hundred thirty".