11055113531 has 16 divisors (see below), whose sum is σ = 13793111808. Its totient is φ = 8608053600.

The previous prime is 11055113513. The next prime is 11055113609. The reversal of 11055113531 is 13531155011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11055113531 is a prime.

It is a super-2 number, since 2×11055113531² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11055113531.

It is not an unprimeable number, because it can be changed into a prime (11055110531) 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, 54356 + ... + 158318.

It is an arithmetic number, because the mean of its divisors is an integer number (862069488).

Almost surely, 2^11055113531 is an apocalyptic number.

11055113531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11055113531 is a deficient number, since it is larger than the sum of its proper divisors (2737998277).

11055113531 is a wasteful number, since it uses less digits than its factorization.

11055113531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105362.

The product of its (nonzero) digits is 1125, while the sum is 26.

Adding to 11055113531 its reverse (13531155011), we get a palindrome (24586268542).

The spelling of 11055113531 in words is "eleven billion, fifty-five million, one hundred thirteen thousand, five hundred thirty-one".