1143155520 has 336 divisors, whose sum is σ = 4460077440. Its totient is φ = 266416128.

The previous prime is 1143155483. The next prime is 1143155527. The reversal of 1143155520 is 255513411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143155527) 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, 710557 + ... + 712163.

It is an arithmetic number, because the mean of its divisors is an integer number (13274040).

Almost surely, 2^1143155520 is an apocalyptic number.

1143155520 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 1143155520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2230038720).

1143155520 is an abundant number, since it is smaller than the sum of its proper divisors (3316921920).

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

1143155520 is a wasteful number, since it uses less digits than its factorization.

1143155520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1143155520 is about 33810.5829585945. The cubic root of 1143155520 is about 1045.6068969974.

Adding to 1143155520 its reverse (255513411), we get a palindrome (1398668931).

The spelling of 1143155520 in words is "one billion, one hundred forty-three million, one hundred fifty-five thousand, five hundred twenty".