13143550 has 72 divisors (see below), whose sum is σ = 30225744. Its totient is φ = 4151040.

The previous prime is 13143539. The next prime is 13143551. The reversal of 13143550 is 5534131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 279627 + ... + 279673.

It is an arithmetic number, because the mean of its divisors is an integer number (419802).

Almost surely, 2^13143550 is an apocalyptic number.

13143550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13143550 is an abundant number, since it is smaller than the sum of its proper divisors (17082194).

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

13143550 is a wasteful number, since it uses less digits than its factorization.

13143550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 13143550 is about 3625.4034258273. The cubic root of 13143550 is about 235.9957746060.

Adding to 13143550 its reverse (5534131), we get a palindrome (18677681).

It can be divided in two parts, 131 and 43550, that added together give a square (43681 = 209²).

The spelling of 13143550 in words is "thirteen million, one hundred forty-three thousand, five hundred fifty".