13145550 has 96 divisors (see below), whose sum is σ = 36854784. Its totient is φ = 3072000.

The previous prime is 13145533. The next prime is 13145557. The reversal of 13145550 is 5554131.

13145550 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 13145550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13145557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51022 + ... + 51278.

It is an arithmetic number, because the mean of its divisors is an integer number (383904).

Almost surely, 2^13145550 is an apocalyptic number.

13145550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13145550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18427392).

13145550 is an abundant number, since it is smaller than the sum of its proper divisors (23709234).

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

13145550 is a wasteful number, since it uses less digits than its factorization.

13145550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 13145550 is about 3625.6792467067. The cubic root of 13145550 is about 236.0077441680.

Adding to 13145550 its reverse (5554131), we get a palindrome (18699681).

It can be divided in two parts, 13145 and 550, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 13145550 in words is "thirteen million, one hundred forty-five thousand, five hundred fifty".