1103811553 has 16 divisors (see below), whose sum is σ = 1231448400. Its totient is φ = 982840320.

The previous prime is 1103811529. The next prime is 1103811557. The reversal of 1103811553 is 3551183011.

It can be written as a sum of positive squares in 8 ways, for example, as 448041889 + 655769664 = 21167^2 + 25608^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103811553 - 2⁵ = 1103811521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1103811557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35803 + ... + 59071.

It is an arithmetic number, because the mean of its divisors is an integer number (76965525).

Almost surely, 2^1103811553 is an apocalyptic number.

1103811553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1103811553 is a deficient number, since it is larger than the sum of its proper divisors (127636847).

1103811553 is a wasteful number, since it uses less digits than its factorization.

1103811553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23412.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1103811553 is about 33223.6595365411. The cubic root of 1103811553 is about 1033.4710410879.

Adding to 1103811553 its reverse (3551183011), we get a palindrome (4654994564).

The spelling of 1103811553 in words is "one billion, one hundred three million, eight hundred eleven thousand, five hundred fifty-three".