1113321555 has 24 divisors (see below), whose sum is σ = 2013661728. Its totient is φ = 567954816.

The previous prime is 1113321439. The next prime is 1113321581. The reversal of 1113321555 is 5551233111.

It is not a de Polignac number, because 1113321555 - 2⁷ = 1113321427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 536802 + ... + 538871.

It is an arithmetic number, because the mean of its divisors is an integer number (83902572).

Almost surely, 2^1113321555 is an apocalyptic number.

1113321555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1113321555 is a deficient number, since it is larger than the sum of its proper divisors (900340173).

1113321555 is a wasteful number, since it uses less digits than its factorization.

1113321555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075707 (or 1075704 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 1113321555 is about 33366.4735175895. The cubic root of 1113321555 is about 1036.4305500005.

Adding to 1113321555 its reverse (5551233111), we get a palindrome (6664554666).

The spelling of 1113321555 in words is "one billion, one hundred thirteen million, three hundred twenty-one thousand, five hundred fifty-five".