1320143550 has 96 divisors (see below), whose sum is σ = 3582627840. Its totient is φ = 319046400.

The previous prime is 1320143549. The next prime is 1320143599. The reversal of 1320143550 is 553410231.

It is a super-3 number, since 3×1320143550³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320143550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 630906 + ... + 632994.

It is an arithmetic number, because the mean of its divisors is an integer number (37319040).

Almost surely, 2^1320143550 is an apocalyptic number.

1320143550 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 1320143550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1791313920).

1320143550 is an abundant number, since it is smaller than the sum of its proper divisors (2262484290).

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

1320143550 is a wasteful number, since it uses less digits than its factorization.

1320143550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498 (or 2493 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1320143550 is about 36333.7797373188. The cubic root of 1320143550 is about 1097.0010738926.

Adding to 1320143550 its reverse (553410231), we get a palindrome (1873553781).

The spelling of 1320143550 in words is "one billion, three hundred twenty million, one hundred forty-three thousand, five hundred fifty".