1115231540 has 24 divisors (see below), whose sum is σ = 2422745640. Its totient is φ = 430709888.

The previous prime is 1115231503. The next prime is 1115231561. The reversal of 1115231540 is 451325111.

It can be written as a sum of positive squares in 4 ways, for example, as 208860304 + 906371236 = 14452^2 + 30106^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960827 + ... + 961986.

It is an arithmetic number, because the mean of its divisors is an integer number (100947735).

Almost surely, 2^1115231540 is an apocalyptic number.

1115231540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115231540 is an abundant number, since it is smaller than the sum of its proper divisors (1307514100).

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

1115231540 is a wasteful number, since it uses less digits than its factorization.

1115231540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922851 (or 1922849 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1115231540 is about 33395.0825721393. The cubic root of 1115231540 is about 1037.0229023303.

Adding to 1115231540 its reverse (451325111), we get a palindrome (1566556651).

The spelling of 1115231540 in words is "one billion, one hundred fifteen million, two hundred thirty-one thousand, five hundred forty".