1143215520 has 96 divisors (see below), whose sum is σ = 3717342720. Its totient is φ = 295019520.

The previous prime is 1143215471. The next prime is 1143215531. The reversal of 1143215520 is 255123411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23535 + ... + 53294.

It is an arithmetic number, because the mean of its divisors is an integer number (38722320).

Almost surely, 2^1143215520 is an apocalyptic number.

1143215520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143215520 is an abundant number, since it is smaller than the sum of its proper divisors (2574127200).

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

1143215520 is a wasteful number, since it uses less digits than its factorization.

1143215520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76878 (or 76870 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1143215520 is about 33811.4702430995. The cubic root of 1143215520 is about 1045.6251900221.

Adding to 1143215520 its reverse (255123411), we get a palindrome (1398338931).

The spelling of 1143215520 in words is "one billion, one hundred forty-three million, two hundred fifteen thousand, five hundred twenty".