13351520 has 144 divisors (see below), whose sum is σ = 39817008. Its totient is φ = 4193280.

The previous prime is 13351453. The next prime is 13351537. The reversal of 13351520 is 2515331.

13351520 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

13351520 is strictly pandigital in base 8.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 13351492 and 13351501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101855 + ... + 101985.

It is an arithmetic number, because the mean of its divisors is an integer number (276507).

Almost surely, 2^13351520 is an apocalyptic number.

13351520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13351520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19908504).

13351520 is an abundant number, since it is smaller than the sum of its proper divisors (26465488).

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

13351520 is a wasteful number, since it uses less digits than its factorization.

13351520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 13351520 is about 3653.9731799782. The cubic root of 13351520 is about 237.2339847055.

Adding to 13351520 its reverse (2515331), we get a palindrome (15866851).

The spelling of 13351520 in words is "thirteen million, three hundred fifty-one thousand, five hundred twenty".