11115255511 has 8 divisors (see below), whose sum is σ = 11235324464. Its totient is φ = 10995298560.

The previous prime is 11115255497. The next prime is 11115255533. The reversal of 11115255511 is 11555251111.

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 11115255511 - 2²⁵ = 11081701079 is a prime.

It is a super-2 number, since 2×11115255511² (a number of 21 digits) contains 22 as substring.

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 11115255511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115255611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179821 + ... + 233593.

It is an arithmetic number, because the mean of its divisors is an integer number (1404415558).

Almost surely, 2^11115255511 is an apocalyptic number.

11115255511 is a deficient number, since it is larger than the sum of its proper divisors (120068953).

11115255511 is an equidigital number, since it uses as much as digits as its factorization.

11115255511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56001.

The product of its digits is 1250, while the sum is 28.

The spelling of 11115255511 in words is "eleven billion, one hundred fifteen million, two hundred fifty-five thousand, five hundred eleven".