1115550613 has 4 divisors (see below), whose sum is σ = 1115875660. Its totient is φ = 1115225568.

The previous prime is 1115550599. The next prime is 1115550617. The reversal of 1115550613 is 3160555111.

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 535367044 + 580183569 = 23138^2 + 24087^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115550613 - 2⁹ = 1115550101 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 (1115550617) 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, 157320 + ... + 164257.

It is an arithmetic number, because the mean of its divisors is an integer number (278968915).

Almost surely, 2^1115550613 is an apocalyptic number.

It is an amenable number.

1115550613 is a deficient number, since it is larger than the sum of its proper divisors (325047).

1115550613 is an equidigital number, since it uses as much as digits as its factorization.

1115550613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325046.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 1115550613 is about 33399.8594757523. The cubic root of 1115550613 is about 1037.1217919467.

The spelling of 1115550613 in words is "one billion, one hundred fifteen million, five hundred fifty thousand, six hundred thirteen".