1115523359 has 4 divisors (see below), whose sum is σ = 1115590320. Its totient is φ = 1115456400.

The previous prime is 1115523341. The next prime is 1115523373. The reversal of 1115523359 is 9533255111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9533255111 = 19 ⋅501750269.

It is a cyclic number.

It is not a de Polignac number, because 1115523359 - 2¹⁶ = 1115457823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115523319) 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, 13259 + ... + 49059.

It is an arithmetic number, because the mean of its divisors is an integer number (278897580).

Almost surely, 2^1115523359 is an apocalyptic number.

1115523359 is a deficient number, since it is larger than the sum of its proper divisors (66961).

1115523359 is an equidigital number, since it uses as much as digits as its factorization.

1115523359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66960.

The product of its digits is 20250, while the sum is 35.

The square root of 1115523359 is about 33399.4514775318. The cubic root of 1115523359 is about 1037.1133459091.

The spelling of 1115523359 in words is "one billion, one hundred fifteen million, five hundred twenty-three thousand, three hundred fifty-nine".