13031120 has 20 divisors (see below), whose sum is σ = 30297540. Its totient is φ = 5212416.

The previous prime is 13031101. The next prime is 13031159. The reversal of 13031120 is 2113031.

13031120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4293184 + 8737936 = 2072^2 + 2956^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81365 + ... + 81524.

It is an arithmetic number, because the mean of its divisors is an integer number (1514877).

Almost surely, 2^13031120 is an apocalyptic number.

13031120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13031120 is an abundant number, since it is smaller than the sum of its proper divisors (17266420).

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

13031120 is a wasteful number, since it uses less digits than its factorization.

13031120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162902 (or 162896 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 13031120 is about 3609.8642633761. The cubic root of 13031120 is about 235.3209437061.

Adding to 13031120 its reverse (2113031), we get a palindrome (15144151).

The spelling of 13031120 in words is "thirteen million, thirty-one thousand, one hundred twenty".