1331143040 has 64 divisors (see below), whose sum is σ = 3349782000. Its totient is φ = 504428544.

The previous prime is 1331143031. The next prime is 1331143063. The reversal of 1331143040 is 403411331.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42575 + ... + 66894.

Almost surely, 2^1331143040 is an apocalyptic number.

1331143040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331143040 is an abundant number, since it is smaller than the sum of its proper divisors (2018638960).

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

1331143040 is a wasteful number, since it uses less digits than its factorization.

1331143040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109507 (or 109495 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1331143040 is about 36484.8330131851. The cubic root of 1331143040 is about 1100.0394035472.

Adding to 1331143040 its reverse (403411331), we get a palindrome (1734554371).

The spelling of 1331143040 in words is "one billion, three hundred thirty-one million, one hundred forty-three thousand, forty".