1101311555 has 8 divisors (see below), whose sum is σ = 1326488400. Its totient is φ = 877772896.

The previous prime is 1101311513. The next prime is 1101311647. The reversal of 1101311555 is 5551131011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1101311555 - 2¹⁴ = 1101295171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1101311555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408065 + ... + 410754.

It is an arithmetic number, because the mean of its divisors is an integer number (165811050).

Almost surely, 2^1101311555 is an apocalyptic number.

1101311555 is a deficient number, since it is larger than the sum of its proper divisors (225176845).

1101311555 is an equidigital number, since it uses as much as digits as its factorization.

1101311555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819093.

The product of its (nonzero) digits is 375, while the sum is 23.

The square root of 1101311555 is about 33186.0144488608. The cubic root of 1101311555 is about 1032.6902228536.

Adding to 1101311555 its reverse (5551131011), we get a palindrome (6652442566).

The spelling of 1101311555 in words is "one billion, one hundred one million, three hundred eleven thousand, five hundred fifty-five".