13555240111 has 16 divisors (see below), whose sum is σ = 15789703680. Its totient is φ = 11396342880.

The previous prime is 13555240103. The next prime is 13555240121. The reversal of 13555240111 is 11104255531.

It is a cyclic number.

It is not a de Polignac number, because 13555240111 - 2³ = 13555240103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13555240111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13555240121) 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, 109080 + ... + 197506.

It is an arithmetic number, because the mean of its divisors is an integer number (986856480).

Almost surely, 2^13555240111 is an apocalyptic number.

13555240111 is a deficient number, since it is larger than the sum of its proper divisors (2234463569).

13555240111 is an equidigital number, since it uses as much as digits as its factorization.

13555240111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88854.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 13555240111 its reverse (11104255531), we get a palindrome (24659495642).

The spelling of 13555240111 in words is "thirteen billion, five hundred fifty-five million, two hundred forty thousand, one hundred eleven".