13031118 has 24 divisors (see below), whose sum is σ = 29280888. Its totient is φ = 4343544.

The previous prime is 13031101. The next prime is 13031159. The reversal of 13031118 is 81113031.

It is a happy number.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13031118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12921 + ... + 13892.

It is an arithmetic number, because the mean of its divisors is an integer number (1220037).

Almost surely, 2^13031118 is an apocalyptic number.

13031118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13031118 is an abundant number, since it is smaller than the sum of its proper divisors (16249770).

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

13031118 is an equidigital number, since it uses as much as digits as its factorization.

13031118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26830 (or 26818 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 13031118 is about 3609.8639863574. The cubic root of 13031118 is about 235.3209316672.

Adding to 13031118 its reverse (81113031), we get a palindrome (94144149).

The spelling of 13031118 in words is "thirteen million, thirty-one thousand, one hundred eighteen".