1115505223 has 4 divisors (see below), whose sum is σ = 1274863120. Its totient is φ = 956147328.

The previous prime is 1115505203. The next prime is 1115505227. The reversal of 1115505223 is 3225055111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3225055111 = 1129 ⋅2856559.

It is a cyclic number.

It is not a de Polignac number, because 1115505223 - 2²¹ = 1113408071 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 (1115505227) 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, 79678938 + ... + 79678951.

It is an arithmetic number, because the mean of its divisors is an integer number (318715780).

Almost surely, 2^1115505223 is an apocalyptic number.

1115505223 is a deficient number, since it is larger than the sum of its proper divisors (159357897).

1115505223 is an equidigital number, since it uses as much as digits as its factorization.

1115505223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159357896.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1115505223 is about 33399.1799749635. The cubic root of 1115505223 is about 1037.1077254711.

The spelling of 1115505223 in words is "one billion, one hundred fifteen million, five hundred five thousand, two hundred twenty-three".