1115530331 has 4 divisors (see below), whose sum is σ = 1121693664. Its totient is φ = 1109367000.

The previous prime is 1115530313. The next prime is 1115530391. The reversal of 1115530331 is 1330355111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1115530331 - 2⁶ = 1115530267 is a prime.

It is a super-2 number, since 2×1115530331² = 2488815838761939122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1115530297 and 1115530306.

It is not an unprimeable number, because it can be changed into a prime (1115530391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3081395 + ... + 3081756.

It is an arithmetic number, because the mean of its divisors is an integer number (280423416).

Almost surely, 2^1115530331 is an apocalyptic number.

1115530331 is a deficient number, since it is larger than the sum of its proper divisors (6163333).

1115530331 is an equidigital number, since it uses as much as digits as its factorization.

1115530331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6163332.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 1115530331 is about 33399.5558503403. Note that the first 3 decimals coincide. The cubic root of 1115530331 is about 1037.1155065508.

Adding to 1115530331 its reverse (1330355111), we get a palindrome (2445885442).

The spelling of 1115530331 in words is "one billion, one hundred fifteen million, five hundred thirty thousand, three hundred thirty-one".