1115334561 has 96 divisors (see below), whose sum is σ = 1838592000. Its totient is φ = 597991680.

The previous prime is 1115334533. The next prime is 1115334601. The reversal of 1115334561 is 1654335111.

It is not a de Polignac number, because 1115334561 - 2⁷ = 1115334433 is a prime.

It is a super-2 number, since 2×1115334561² = 2487942365922125442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1115334061) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12531805 + ... + 12531893.

It is an arithmetic number, because the mean of its divisors is an integer number (19152000).

Almost surely, 2^1115334561 is an apocalyptic number.

1115334561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1115334561 is a deficient number, since it is larger than the sum of its proper divisors (723257439).

1115334561 is a wasteful number, since it uses less digits than its factorization.

1115334561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 224 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 1115334561 is about 33396.6249941517. The cubic root of 1115334561 is about 1037.0548334714.

Adding to 1115334561 its reverse (1654335111), we get a palindrome (2769669672).

The spelling of 1115334561 in words is "one billion, one hundred fifteen million, three hundred thirty-four thousand, five hundred sixty-one".