1115521153 has 4 divisors (see below), whose sum is σ = 1142729028. Its totient is φ = 1088313280.

The previous prime is 1115521129. The next prime is 1115521219. The reversal of 1115521153 is 3511255111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 463842369 + 651678784 = 21537^2 + 25528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115521153 - 2¹³ = 1115512961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115521853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13603876 + ... + 13603957.

It is an arithmetic number, because the mean of its divisors is an integer number (285682257).

Almost surely, 2^1115521153 is an apocalyptic number.

It is an amenable number.

1115521153 is a deficient number, since it is larger than the sum of its proper divisors (27207875).

1115521153 is an equidigital number, since it uses as much as digits as its factorization.

1115521153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27207874.

The product of its digits is 750, while the sum is 25.

The square root of 1115521153 is about 33399.4184530210. The cubic root of 1115521153 is about 1037.1126622618.

Adding to 1115521153 its reverse (3511255111), we get a palindrome (4626776264).

The spelling of 1115521153 in words is "one billion, one hundred fifteen million, five hundred twenty-one thousand, one hundred fifty-three".