1115351603 has 4 divisors (see below), whose sum is σ = 1118013960. Its totient is φ = 1112689248.

The previous prime is 1115351591. The next prime is 1115351609. The reversal of 1115351603 is 3061535111.

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

It is a cyclic number.

It is not a de Polignac number, because 1115351603 - 2⁶ = 1115351539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115351609) 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, 1330550 + ... + 1331387.

It is an arithmetic number, because the mean of its divisors is an integer number (279503490).

Almost surely, 2^1115351603 is an apocalyptic number.

1115351603 is a deficient number, since it is larger than the sum of its proper divisors (2662357).

1115351603 is an equidigital number, since it uses as much as digits as its factorization.

1115351603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662356.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 1115351603 is about 33396.8801387195. The cubic root of 1115351603 is about 1037.0601154137.

Adding to 1115351603 its reverse (3061535111), we get a palindrome (4176886714).

The spelling of 1115351603 in words is "one billion, one hundred fifteen million, three hundred fifty-one thousand, six hundred three".