1115522889 has 32 divisors (see below), whose sum is σ = 1688830080. Its totient is φ = 649285632.

The previous prime is 1115522869. The next prime is 1115522917. The reversal of 1115522889 is 9882255111.

It is not a de Polignac number, because 1115522889 - 2²⁸ = 847087433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1115522889.

It is not an unprimeable number, because it can be changed into a prime (1115522869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 901179 + ... + 902415.

It is an arithmetic number, because the mean of its divisors is an integer number (52775940).

Almost surely, 2^1115522889 is an apocalyptic number.

1115522889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1115522889 is a deficient number, since it is larger than the sum of its proper divisors (573307191).

1115522889 is a wasteful number, since it uses less digits than its factorization.

1115522889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489.

The product of its digits is 57600, while the sum is 42.

The square root of 1115522889 is about 33399.4444414873. Note that the first 5 decimals coincide. The cubic root of 1115522889 is about 1037.1132002544.

The spelling of 1115522889 in words is "one billion, one hundred fifteen million, five hundred twenty-two thousand, eight hundred eighty-nine".